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Resposta de referência

Below are 3 Security Policies available in vSphere Standard as well as Distributed Switch: Promiscuous Mode: It is used mostly when you want to Capture or Sniff all the packets coming on the same port group. There are 2 options available Accept and Reject. When it is set to Accept then you can monitor or capture all the network packets on the vSphere standard switch that are allowed under the VLAN policy for the port group that the adapter is connected to, but when it is set to Reject there no impact on the packets sent or received. MAC Address Changes: It works on the MAC Address of the Virtual Machines. There are 2 options available Accept and Reject. If you set it to Accept then if the VM's MAC address is changed from the original MAC Address assigned VM will able to send and receive network packets, But when it is set to Reject then If the VM's MAC Address is changed from the original MAC Address then VM will not able to send or receive network packets. Forged Transmits: It also works same as MAC Address changes in which MAC Address of the VM is Compared by ESXi with the Source MAC Address. There are 2 options available Accept and Reject. When it is set to Accept No filtering is performed and all outbound frames are passed, but when it is set to Reject Any outbound frame with a source MAC address that is different from the one currently set on the adapter are dropped.

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Resposta de referência

VMware lets you allocate more vCPUs and memory than physically exist because workloads rarely peak together. For CPU, it monitors metrics like CPU Ready Time, and for memory, it applies Transparent Page Sharing to optimize use. In my systems design capstone, we intentionally overcommitted a lab host to see when performance dropped. Watching how VMware managed to keep things stable showed me that overcommitment is a powerful tool, but you have to monitor carefully to avoid contention.

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Resposta de referência

- Increase the size of the virtual disk. - Clean old snapshots. - Delete unnecessary files. - Enable thin provisioning.

4

Resposta de referência

A virtual machine manager, also called a hypervisor, is the software that manages and controls the VMs. It allocates resources to VMs, provides isolation between them, and manages their interactions with the host machine.

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Resposta de referência

Port Groups aggregates multiple ports of virtual machines. Each port group is identified by a network label, which is unique to the current host. Network labels are used to make virtual machine configuration portable across hosts. You can create either VMkernel port group or VM port group based on requirements. You can set VLAN IDs on Port Groups.

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Resposta de referência

We'd like this because we want our services running without interruption. Assume like, for a couple of reasons if anyone of the ESX server within the cluster goes down suddenly, what happens to the virtual machines which are running thereon particular server? Do they continue to run or go down? Yes, they also go down. But with the help of VMware HA, these VM's are often restarted immediately on the other ESX servers within an equivalent cluster. But here, you'll get a downtime of 5 –10 mins because a server crash is an unexpected thing.

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Resposta de referência

Consideration of such as HA, DRS, vSAN, NSX, and hybrid cloud integration.

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Resposta de referência

A virtual network switch is a software-based network switch that runs within a hypervisor. It provides connectivity for virtual machines, allowing them to communicate with each other and with the physical network. Virtual switches provide flexibility and control over the virtual network environment.

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Resposta de referência

VMware DRS stands for Distributed Resource Scheduler and it helps to balance the resources across various hosts in a dynamic manner under resource pool. It helps the users to find out the rules and policies that decide how virtual machines can be able to deploy resources, and multiple virtual machines must prioritize these resources.

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Resposta de referência

A sub-interface, or an internal interface, is a logical interface that is created and mapped to the physical interface. Sub-interfaces are simply a division of a physical interface into multiple logical interfaces. This logical interface uses the parent physical interface to move data. Remember that you cannot use sub-interfaces for HA because a heartbeat needs to traverse a physical port from one hypervisor to another between the Edge appliances.

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Resposta de referência

Common scenarios include a VM that won't power on, host disconnects, datastore full issues, vMotion failures, and vCenter upgrade failures. Expand: Walk interviewers through a troubleshooting framework: confirm symptoms, check logs (vpxd, hostd), inspect host and datastore states, validate networking and storage latency, test with reproducible steps, and escalate/change configuration with rollback plans. Include concrete commands or UI paths (e.g., host logs, esxcli, vSphere client tasks). Interviewers love to hear about specific commands you'd run and why. Takeaway: A clear step-by-step troubleshooting approach shows you can resolve incidents under pressure.

12

Resposta de referência

vDS can provide: - The central administration for a virtual data center - Central provision, and - Monitoring

13

Resposta de referência

VMware vSphere is a suite of virtualization products that provides a scalable platform for running virtual machines and managing virtual infrastructure. Fundamentally, vSphere is all about providing efficient and optimized resource management for running, managing, and securing applications in a common operating environment across clouds. The vSphere suite comprises several components, including the vCenter Server for centralized management, the ESXi hypervisor for running VMs, and a variety of other tools and features for enhancing the virtualization experience. Key functions of vSphere include server consolidation by running multiple isolated VMs on a single physical server, high availability to minimize downtime, vMotion for live migration of VMs between hosts, and Distributed Resource Scheduler (DRS) for balancing workloads across hosts in a cluster. It also offers advanced features for network and storage virtualization with vSAN, NSX and distributed vSwitch. vSphere also provides a robust security model with features like VM Encryption, Secure Boot, and the Trusted Platform Module (TPM) for securing both the infrastructure and the applications running on it. Overall, vSphere forms the backbone of most VMware-based virtual environments.

14

Resposta de referência

To find the KVM version use the command 'virsh version'

15

Resposta de referência

Research their focus on innovation, global reach, and fostering a culture of learning.

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Resposta de referência

Thick Provision Lazy Zeroed Creates a virtual disk in a default thick format. Space required for the virtual disk is allocated when the virtual disk is created. Data remaining on the physical device is not erased during creation, but is zeroed out on demand at a later time on first write from the virtual machine. Using the default flat virtual disk format does not zero out or eliminate the possibility of recovering deleted files or restoring old data that might be present on this allocated space. You cannot convert a flat disk to a thin disk. Thick Provision Eager Zeroed A type of thick virtual disk that supports clustering features such as Fault Tolerance. Space required for the virtual disk is allocated at creation time. In contrast to the flat format, the data remaining on the physical device is zeroed out when the virtual disk is created. It might take much longer to create disks in this format than to create other types of disks. Thin Provision It provides on on-demand allocation of blocks of data. All the space allocated at the time of creation of virtual disk is not utilized on the hard disk, rather only the size with utilized data is locked and the size increases as the amount of data is increased on the disk. With thin provisioning, storage capacity utilization efficiency can be automatically driven up towards 100% with very little administrative overhead.

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Resposta de referência

VMware has the applications and software to do the virtualization process. VMware products have been categorized into two levels such as desktop applications, and Server applications. Here are some core benefits of VMWare: - You can run multiple operating systems as well as applications on a single desktop computer - You can be able to control the hardware to increase productivity with the help of a few servers - It simplifies processes such as IT management and increases the new application deployment process - You can save up to 50% or more of your cost spent on the Information Technology

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Resposta de referência

Ensure business continuity and forever offered IT Reduce IT hardware and in operation prices Improve application quality Enhanced security and knowledge protection

19

Resposta de referência

ESXi's latest available version is ESXi 7.0. Licensing for ESXi hosts is tied to vSphere licenses, with each vSphere license specifying the capacity for licensing multiple physical CPUs on ESXi hosts. In the case of vSphere 7.0, a single CPU license is valid for up to 32 cores.

20

Resposta de referência

vCenter Server 4.x and vCenter Server 5.x support 1 virtual CPU per protected virtual machine.

21

Resposta de referência

Working with VMware vCloud Director has been a significant part of my VMware experience, especially in environments focused on providing Infrastructure-as-a-Service (IaaS) solutions. I've used vCloud Director for managing and orchestrating virtual resources in multi-tenant cloud environments. One of the notable features of vCloud Director that I utilized extensively is its ability to create Virtual DataCenters (vDCs) - a logical grouping of compute, storage, and network resources. This feature lets us isolate resources for specific groups or projects, and it's especially handy in a multi-tenant environment where departmental or client segregation is essential. Additionally, the ability to control and automate resource provisioning through RESTful API calls dramatically streamlined workload deployments. It allowed me to incorporate vCloud Director operations into broader IT automation workflows leading to more efficient operations. Lastly, I found the vCloud networking and security functions noteworthy. They facilitated robust and flexible network management, including the creation of isolated network segments, VPNs and firewall rules, all within the user interface. Overall, working with VMware vCloud Director has reaffirmed the value of cloud orchestration tools in efficiently managing and abstracting virtual resources.

22

Resposta de referência

VMkernel in VMware is the primary component or operating system that handles the critical tasks in VMware ESXi. It's a microkernel that coordinates all hardware interactions, making the virtualization process possible. The VMkernel handles several key operations including memory management, device I/O, storage access, network communication, and the scheduling of VMs and containers. Key VMware features rely heavily on the VMkernel. For instance, vMotion, which is responsible for the live migration of VMs from one host to another, and VSAN, which provides shared storage for virtual machines, are both functions that operate at the VMkernel level. In an ESXi host, different VMkernel interfaces or VMkernel ports can be created to handle specific network services like vMotion or iSCSI communication. Each of these VMkernel ports can be assigned its own IP address, essentially making each service manageable independently. This separation of duties helps improve efficiency and security in a virtual environment.

23

Resposta de referência

VMware can follow VMware vSphere support policy to still offer technical support for ESX design.

24

Resposta de referência

Hypervisor is a peace of a software that is being install on the physical machine , which then further creates and run virtual machines. Virtual machine are known as guest machines and host machine is the hypervisor on which different virtual machines are created.

25

Resposta de referência

There are basically 5 Types of Virtualization: - Server Virtualization: Enables multiple operating systems to run on a single physical server as highly efficient virtual machines. Examples are VMware vSphere, Microsoft Hyper-V, RedHat KVM etc. - Storage Virtualization: Enables grouping of multiple physicals storage into single logical storage and it will be presented as a single storage to all the servers. Example VMware vSAN. - Network Virtualization: Allows you to make a complete software defined networks by decoupling the virtual networks from the underlying network hardware. Examples are VMware NSX. - Desktop Virtualization: Enables you to deploy multiple desktops on the single or multiple hardware at a single location and desktop is accessed by users from any location using any device. It is also called as Virtual Desktop Infrastructure (VDI). Examples are VMware Horizon View, Citrix Xen Desktop. - Application Virtualization: Enables you to host an Application on the server and it can be accessed from anywhere with Internet connectivity, where users don't have to install Application. Examples are VMware ThinApp, Citrix XenApp.

26

Resposta de referência

The value ranges from 1 to 255 and default ranges are: Connected (0), Static (1), External BGP (20), OSPF intra-area (30), OSPF inter-area (110), and Internal BGP (200). Note: Any of the above values will be entered in “Admin Distance” by editing the Default Gateway configuration in Routing Configuration.

27

Resposta de referência

Topics include datastore types (VMFS, vSAN, NFS), multipathing, storage policies, and performance troubleshooting. Expand: Explain when to choose vSAN vs. external SAN, how storage IOPS and latency affect VM performance, and how to troubleshoot pathing issues with esxcli or multipath tools. Discuss storage policies and compliance, thin vs. thick provisioning, and snapshot growth implications. Interviewers often expect you to correlate storage metrics to workload behavior. Takeaway: Linking storage concepts to performance outcomes demonstrates practical troubleshooting skills.

28

Resposta de referência

A vSphere Standard Switch(vSS) is used for a single ESXi host, whereas a vSphere Distributed Switch(vDS) is best suited for systems with large data centres.

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Resposta de referência

Check host health, datastore capacity, VM configuration files, snapshots, and resource constraints (reservations/limits). Expand: Verify host connectivity and maintenance mode, inspect vmware.log for errors, confirm datastore accessibility and free space, check for locked files or corrupt VMDKs, and review recent changes (snapshots, migrations). If needed, attempt to register the VM on another host or mount the datastore to inspect files. Communicate rollback steps and impact. Takeaway: Demonstrate a logical, evidence-based approach that prioritizes data integrity.

30

Resposta de referência

A virtual machine migration strategy involves planning and executing the movement of virtual machines between physical hosts or data centers. It includes considerations for minimizing downtime, ensuring data integrity, and maintaining service availability.

31

Resposta de referência

VMware Tanzu is a suite of products designed to help organizations build, run, and manage cloud-native applications using technologies like Kubernetes, containers, and microservices. It includes tools such as Tanzu Kubernetes Grid, Tanzu Application Service, and Tanzu Mission Control, enabling businesses to simplify the development, deployment, and management of modern applications across hybrid and multi-cloud environments.

32

Resposta de referência

a) .nvram - It is a nonvolatile ram. It is permanent memory. It contains system Bios. b) .vmdk - It is the original file. It stores operating system application. c) .vmsd - It is a metadata of snapshot. If we create snapshot the metadata of snapshot stores in vmsd. d) .vmx - It always stores the hardware configuration of vm. e) .vmx.lck - It is a lock file. f) .vswp - It is a swap file. Virtual memory of our system. If we install ESXi in base machine we get only 1 .vswp file as I have installed in vmware workstation and workstation is installed in base laptop for that I have 2 .vswp file. g) vm.scroreboard - This is only available in latest 8.0 esxi host. h) vmware.log - It creates when we start the vm only.

33

Resposta de referência

- VMware vSphere: A comprehensive virtualization platform that includes ESXi hypervisor, vCenter Server, and other components. - VMware vCenter Server: A centralized management platform for VMware environments. It's part of the vSphere suite.

34

Resposta de referência

A logical configuration on the switch port to segment the IP Traffic where each segment cannot communicate with other segments without proper rules mentioned is called VLAN and every VLAN has a defined number called VLAN ID.

35

Resposta de referência

The main difference between VMware FT and HA is: FT is enabled per VM and HA is enabled per cluster and VMware. In FT, there is no downtime, because the second copy will be activated in case of any host failure. while in HA, VMs will be re-started and powered-on on another host in case of a host failure.

36

Resposta de referência

FT stands for Fault Tolerance, a very prominent component of VMware vSphere. It provides continuous availability for VMs when an ESXi host fails. It supports up to 4 vCPUs and 64 GB memory. FT is very bandwidth-intensive, and 10GB NIC is recommended to configure it. It creates a complete copy of an entire VM, including storage, computing, and memory.

37

Resposta de referência

A virtual machine is a software computer like a physical computer. It runs an operating system and applications on top of a physical computer; multiple Virtual Machines can be created on top of a single physical computer.

38

Resposta de referência

To write a Bash script that takes a VM name as an argument and retrieves its current status, you can use the virsh command to interact with the hypervisor. Here's a simple script that demonstrates this: #!/bin/bash VM_NAME=$1 virsh domstate $VM_NAME

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Resposta de referência

If the promiscuous mode set to Accept, all the communication is visible to all the virtual machines, in other words all the packets are sent to all the ports on vSwitch If the promiscuous mode set to Reject, the packets are sent to intended port, so that the intended Virtual machine was able to see the communication.

40

Resposta de referência

The administrator should copy the storage settings from the Standard-Config host profile to the others. This action allows the selective application of storage configuration from one host profile to others, ensuring consistent storage settings across the hosts without altering other configuration aspects.

41

Resposta de referência

Staying updated with the latest changes in VMware technology is a crucial part of my job, and I utilize various sources and strategies to do so. Official VMware resources are my first point of reference. I regularly check VMware's official publications, including the latest releases and documentation on their website, and I subscribe to their official blog. I also participate in VMware's official forums and community platforms like VMTN (VMware Technology Network) where VMware users share their experiences, challenges, solutions, and insights on the latest updates and features. Social media outlets like LinkedIn, Twitter, and Reddit often host discussions and posts from VMware experts and enthusiasts, offering real-time information about industry trends and software updates. Lastly, I believe in learning through experience. I make time to experiment with the latest releases in a testing environment. This hands-on approach helps me understand new features, how they perform, interoperate, and any possible limitations or issues that may come up. Professional development is a continuous process, whether it's attending webinars, participating in trainings and workshops, or gaining certifications, I try to keep refining my VMware skills to remain updated and effective in my role.

42

Resposta de referência

Yes, vSAN-ready, such as VxRail 4.0 and 4.5, are available in the market. VxRail is the combination of min 3 servers that are part of a cluster and can scale up to 64 servers.

43

Resposta de referência

It is used to segregate network traffic such as vMotion, FT, management traffic, etc.

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Resposta de referência

- Type-1 Hypervisor: It acts as a lightweight OS and runs directly on the host system. A base server OS is not required, and direct hardware access is available. Its example includes VMware ESXi, Citrix XenServer, etc. - Type-2 Hypervisor: It cannot run directly on the underlying host system, but can run as an application layer on a host system, similar to other computer programs. Its example includes VMware player or parallel desktop, VMware Server, etc. Advantages of using Type-1 over Type-2 Hypervisor: It is more secure to use type-1 hypervisors since they do not rely on the underlying OS, unlike type-2 hypervisors. The type 2 server also loses some efficiency, performance, and speed due to this dependency. So, if you're under attack, a type-1 hypervisor will give you better protection than a type-2 hypervisor.

45

Resposta de referência

Simple network management protocol (SNMP) traps are alert messages sent from a remote SNMP-enabled device to a collector. You can configure the SNMP agent to forward SNMP traps. By default, the SNMP trap mechanism is disabled. Only critical and high severity notifications are sent to the SNMP manager when the SNMP trap is enabled.

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Resposta de referência

Virtualization is fundamental to cloud computing as it enables the creation and management of virtual resources in a cloud environment. It allows for efficient resource allocation, scalability, and on-demand provisioning of cloud services.

47

Resposta de referência

Hardening a VMware virtual machine is a crucial aspect of securing your overall VMware infrastructure. Here's a high-level approach: First, I would always start with the guest operating system. This involves securing user access, using strong passwords, applying least privileges principle, and regular patching. I would also disable unnecessary services, protocols and remove any unused hardware from the VM configuration to reduce potential attack vectors. Next, install the most recent version of VMware Tools for the virtual machine. VMware Tools aids in the overall operation of the VM and ensures optimal security and performance. Consideration should also be given to the virtual hardware of the VM. I'd adhere to best practices such as disabling unnecessary devices and hardware, such as floppy drives if not required. Then, I'd ensure VMs are isolated as much as possible. I would utilize separate VLANs or network segments as much as possible, isolate management traffic, and enforce strict firewall rules. Finally, logging must not be overlooked. Ensuring that all relevant logs are enabled will assist in identifying and understanding any potential attacks. These steps highlight some key considerations for hardening a VM. It's recommended to follow VMware's official Hardening Guide that provides a checklist of potential security risks and how to mitigate them. Security is an evolving process, so it's also important to stay updated with the latest VMware patches, updates, and security best practices.

48

Resposta de referência

VMware NSX is a family of virtual networking and security software products that originated from the combination of VMware's vCloud Networking and Security (vCNS) and Nicira's Network Virtualization Platform (NVP) intellectual property. NSX, which stands for software-defined networking (SDN), is a fundamental component of VMware's vision for a software-defined data center (SDDC), enabling cloud computing through VMware's virtualization technologies. VMware's objective with NSX is to create virtual networking environments seamlessly, eliminating the need for direct administrator intervention or reliance on command-line interfaces (CLI).

49

Resposta de referência

Raw Device Mapping is the technology used by VMware to enable the use of a storage LUN directly by the VM. This facilitates a significant increase in performance and efficiency.

50

Resposta de referência

Most vMotion failures often happen because of network misconfigurations, incompatible CPUs, or storage issues. I'd start by checking that both hosts are vMotion-enabled and can communicate properly. Then, I'd verify shared storage and CPU compatibility. During my internship, we encountered repeated vMotion timeouts, which turned out to be due to a mismatched VLAN tag on one host. Fixing that instantly resolved the issue. That experience taught me the importance of checking the basics first because those small errors can be critical.

51

Resposta de referência

A Distributed Resource Scheduler(DRS) is used for effectively distributing resources in the VMware environment. It makes use of Clusters and VMware HA to manage resources dynamically. Moreover, it gives the end-user the facility to change rules governing the deployment of various VM resources.

52

Resposta de referência

Inventory, SSO, tasks, API.

53

Resposta de referência

DRS (Distributed Resource Scheduler), as the name suggests, provides a way to schedule and balance resources across a vSphere environment. Through the use of clusters and resource pools, virtual environments are able to automatically balance available resources across hosts. DRS uses VMware HA (High Availability) to move VMs from one host to another to ensure that resources are evenly distributed among them.

54

Resposta de referência

Troubleshooting performance issues in VMware begins with identifying symptoms such as slow response times or high CPU usage. Using performance monitoring tools like vSphere Client or vRealize Operations Manager, gather data on metrics such as CPU, memory, disk I/O, and network throughput. Analyze these metrics to pinpoint bottlenecks or anomalies affecting VM performance.

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Resposta de referência

The administrator should deploy a local content library for this purpose. A content library is a repository where VM templates, ISO images, and other types of vSphere content can be stored and managed centrally. It supports versioning and makes it easy to manage and deploy templates across different vCenter Server instances, which is especially useful for handling resources in remote offices.

56

Resposta de referência

A VMware Snapshot is a virtual machine state and data captured at a specific period in time, mainly useful in backup, testing, and rollback.

57

Resposta de referência

NFS generally referred to as Network File Systems, may be file-level storage allocated by shared storage. Its network-attached storage will be shared through a cluster in vSphere. It also allows a user on a computer to access files over a network similar to local storage.

58

Resposta de referência

Common tools include: - VMware vCenter Server: A centralized management console for VMware vSphere. - Microsoft Hyper-V Manager: Management console for Microsoft Hyper-V. - VirtualBox Manager: Management console for Oracle VM VirtualBox. - Libvirt: An open-source library for managing virtualization.

59

Resposta de referência

They test your understanding of upgrade paths, compatibility checks, backup strategies, and rollback planning. Expand: Be ready to explain steps for upgrading ESXi, vCenter, and tools (including prechecks: HCL, backup of vCenter, snapshot policies). Discuss how to schedule maintenance windows, use upgrade planners, and mitigate risks (staged upgrades, test labs). Provide a past example where you planned and executed an upgrade with minimal downtime. Takeaway: Stress planning, backups, and clear rollback criteria to show operational maturity.

60

Resposta de referência

VMFS may be a block-level, high-performance clustered filing system for virtualization. It is often shared between multiple ESXi hosts or VMs and may simultaneously write and read data to and from one storage location.

61

Resposta de referência

Each VM is assigned a unique MAC address upon creation. If the MAC address changes unexpectedly, the VM may experience network connectivity issues due to mismatches with MAC address filtering or security settings in the network. Proper management of MAC addresses is crucial to prevent disruption of communication between VMs and other network devices.

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Resposta de referência

- Install and configure VMware ESXi. - Access the vSphere Client or vSphere Web Client. - Create a new virtual machine. - Specify settings such as CPU, memory, storage, and networking. - Install an operating system on the virtual machine. - Configure additional settings as needed.

63

Resposta de referência

VMware recommends configuring Syslog servers to avoid log flooding on the Edge appliances. When logging is enabled, logs are stored locally on the Edge appliance and consume space. If left unchecked, this can have a performance impact on the Edge appliance and can also result in the Edge appliance stopping due to a lack of disk space.

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Resposta de referência

A datastore is a storage location where virtual machine files are stored and accessed. Datastore is based on a file system which is called VMFS, NFS.

65

Resposta de referência

Data store represents a storage location for virtual machine files. It may be a Virtual Machine File System (VMFS) volume, a directory on Network hooked up Storage, or a neighbourhood filing system path.

66

Resposta de referência

A12: HA (High Availability) and DRS (Distributed Resource Scheduler) are two critical features in VMware that ensure uptime and efficient resource use. Both of these features work together to provide a resilient and efficient virtual infrastructure.

67

Resposta de referência

It is similar to traditional vMotion; in Storage vMotion, a virtual disk of a VM is moved from one datastore to another. During Storage vMotion, virtual disk types think provisioning disk can be transformed to thin-provisioned disk.

68

Resposta de referência

Fault tolerant logging is used to build the communication between any two ESXi server hosts and also configures the FT servers.

69

Resposta de referência

To list all running virtual machines using a hypervisor's command-line tool, you can use Python's subprocess module to execute the command and parse the output. Here's a simple script that demonstrates this: import subprocess result = subprocess.run(['virsh', 'list', '--state-running'], capture_output=True, text=True) print(result.stdout)

70

Resposta de referência

I have previously led a virtualization project aimed at enhancing server utilization. The project involved deploying VMware ESXi servers to consolidate smaller, underutilized servers, resulting in optimized hardware usage and energy savings.

71

Resposta de referência

A resource pool in VMware is a container for virtual machines that allows you to manage resource allocation for those VMs. You can set CPU, memory, and storage limits for a resource pool, ensuring that specific VMs get the resources they need and preventing them from affecting other VMs.

72

Resposta de referência

Some common ESXi commands include: - esxcli: A command-line interface for managing ESXi. - vm-run: A command-line tool for managing VMs. - vim-cmd: A command-line tool for managing vCenter Server.

73

Resposta de referência

VMkernel is an interface that runs directly on the ESXi host between VMs and the system's hardware. It is important because it schedules CPUs, allocates proper memory, and provides an abstraction for other OS.

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Resposta de referência

- Storage migration in VMware involves moving virtual machine disks between datastores for purposes like load balancing, performance optimization, or hardware maintenance. - VMware provides several methods for storage migration, including Storage vMotion, which enables live migration of virtual machine disks without downtime. - Administrators can initiate storage migrations using the vSphere Client or command-line tools, selecting the source and destination datastores and specifying migration options like thin provisioning and disk format conversion.

75

Resposta de referência

This is another question to gauge a candidate's understanding and experience with virtualization technology. There are generally six types of virtualization, including user, hardware, application, desktop, network and storage. While the underlying use of hypervisors and abstraction do the same job, the purpose and goals of each virtualization type can offer different use cases and benefits to the business.

76

Resposta de referência

ESXi uses 4 types of Memory management Techniques to reclaim memory when psychical memory is not available. Below are 4 types: Transparent Page Sharing (TPS): TPS is used when multiple virtual machines are using the same operating system so at that time ESXi will check for identical memory pages and it will keep single copy of identical pages by removing redundant pages. This technique will help ESXi to reclaim memory easily. It is enabled by default. Memory Ballooning: Ballooning is a dynamic memory reclamation technique used when ESXi is running out of memory and it uses balloon driver to reclaim memory from VMs. Balloon driver is included in the VMware Tools which is installed in VM. Memory Compression: When the Ballooning doesn't reclaim memory then ESXi uses Memory Compression. It compresses and stores memory in a cache in the host's main memory. Memory compression occurs when the page's compression ratio is greater than 50%. It is enabled by default. Hypervisor based memory swapping: When the TPS, Ballooning and Memory compression doesn't work ESXi uses Memory Swapping in which ESXi swaps guest VMs memory to the swap file which makes physical memory available for use.

77

Resposta de referência

vSphere replication NFC is that the replication traffic was sent and received using the management interfaces of ESXi and VRA appliances. NFC (Network File Copy) traffic is employed to repeat VM replication data from the vSphere Replication Server appliance at the target site to the destination datastores.

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Resposta de referência

Best practices for managing a virtualized environment include: - Regular Backups: Regularly back up VMs to ensure data recovery in case of failures. - Security Measures: Implement strong security measures to protect VMs from unauthorized access and malware. - Resource Monitoring: Monitor resource utilization of VMs and hosts to optimize performance. - Patch Management: Regularly patch VMs and host operating systems to address security vulnerabilities. - Documentation: Maintain comprehensive documentation of VM configurations and settings.

79

Resposta de referência

The decoupling of software and networking hardware allows you to control your network better because all the logic resides in the software. This control aspect of your network is called the control plane. The control plane provides the means to configure, monitor, troubleshoot, and allow automation against the network.

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Resposta de referência

- VMware supports container orchestration through various tools like Kubernetes, which can be integrated with vSphere. - VMware Tanzu Kubernetes Grid (TKG) allows users to deploy and manage Kubernetes clusters on vSphere infrastructure, providing centralized management and automation for containerized applications. - This service integrates with vSphere to offer streamlined application management and robust support for various cloud-native applications and services.

81

Resposta de referência

Advantage: VMware digital computer virtual machine capability, performance and physical isolation is incredibly good! VMware digital computer options a really comprehensive, laptop professionals tend to use! VMware digital computer is easy interface for users of varied fields of computer! Disadvantages: VMware digital computer large, longer installation time-consuming! VMware digital computer occupies a bigger physical machine resources once using!

82

Resposta de referência

Automated load balancing, modes and rules.

83

Resposta de referência

Fault Tolerance is referred as FT in VMware. FT works on the VM level. VMware Fault Tolerance provides continuous availability for virtual machines by creating and maintaining a Secondary VM that is identical to, and continuously available to replace, the Primary VM in the event of a failover situation. You can enable Fault Tolerance for most mission critical virtual machines.

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Resposta de referência

A common issue in VMware environments is VM failing to power on. Two primary areas to check include: - Datastore Availability: Ensure that the datastore hosting the VM has sufficient free space. Storage full conditions can prevent VMs from powering on. - ESXi Host Licensing: Expired or invalid licenses may restrict VM operations. Confirm that the ESXi host license is current and valid. Additionally, verify VM configuration files for corruption and check for resource constraints on the host.

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- Isolation: Allows testing of applications in isolated environments. - Cost Efficiency: Reduces the need for physical hardware. - Reproducibility: Enables consistent and repeatable testing environments. - Snapshot and Rollback: Provides the ability to save and revert to different states.

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The below table explains the major differences between template and clone in VMware :

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• Automatic Load Balancing – Moves VMs between hosts using vMotion to optimize resource usage. • Initial Placement – When a VM is powered on, DRS suggests or decides the best host. • Resource Pools – Allows allocation of CPU/memory resources to groups of VMs. • Affinity/Anti-Affinity Rules – Control VM placement (e.g., keep VMs together or separate). • Power Management (DPM) – Powers down unused hosts during low demand.

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Storage DRS: Its load and place balance VMs depending on input/output latency and storage capacity. Storage vMotion: vMotion uses non-disruptive, proactive storage migration and reduces VM storage I/O bottlenecks. It also frees up storage capacity. Application HA: HA achieves high availability earmarked for particular apps. Data Protection: This deploys recovery and backup protocols based on EMC Avamar.

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The vCenter Server services are vCenter Server, vSphere Web Client, Inventory Service, vSphere Auto Deploy, vSphere ESXi Dump Collector, VMware vSphere Syslog Collector on Windows and VMware Sphere Syslog Service for the vCenter Server Appliance.

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- Monitoring VM performance in VMware is crucial for optimizing resource utilization and identifying bottlenecks. - Tools such as vSphere Client and vCenter Server Performance Charts offer detailed insights into CPU, memory, storage, and network usage over time. - ESXTOP provides real-time visibility into system processes and resource consumption, aiding in immediate performance tuning.

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Resposta de referência

VMware vCenter Server Enhanced Linked Mode (ELM) is one of the vSphere advanced features that allows connecting multiple vCenter Servers to provide a single interface where you can view, search, and manage permissions, replications of roles, policies, and licenses between multiple vCenter Servers. It allows you to simplify enterprise virtual environments deployed in the same or multiple sites with multiple vCenter Servers while deploying vCenter Servers such as VCSA or Windows Servers.

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The below table explains the major differences between VMware and Hyper-V:

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ESXi is VMware's enterprise-level hypervisor used to run virtual machines. It is installed directly on the physical server (bare-metal installation), and it doesn't require an underlying operating system, which makes it efficient and optimized for virtual environments.

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It has two deployment types till VMware vSphere 6.7. - Embedded Deployment - External deployment In VMware vSphere 7.0 and onwards, External PSC has been deprecated. We can only install PSC in Embedded mode.

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vCloud Suite is an amalgamation of several VMware components and features in a single package. It includes the processes and software for virtualisation, disaster recovery, application management, etc.

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There are two main types of virtualization: - System Virtualization: This type allows you to run entire operating systems within a virtual environment. Examples include VMware Workstation and Oracle VirtualBox. - Process Virtualization: This type virtualizes individual processes or applications. It is often used to improve application isolation and security. An example is Docker.

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It has been found that Type 1 hypervisors offer better performance than Type 2 hypervisors. The reason for the statement is that overhead associated with a host operating system in Type 1 does not affect the application performance and it is more secure.

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This kind of question serves three purposes. It's an easy-sounding question to relax a candidate and get them to talk; it helps gauge the candidate's ability to communicate in an effective and focused manner; and it offers an early map into the candidate's technical strengths and weaknesses. Honest, direct and efficient replies are the best response, but stay brief and let the interviewer move on to specifics.

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Resposta de referência

I have been using VMware products for nearly five years in my previous roles. I began with basic VMware Workstation to perform testing and sandboxing. Later, in a more robust enterprise environment, I primarily worked with VMware vSphere and vCenter to manage and monitor multiple virtual machines. I played a critical role in the setup, configuration, and management of these environments. This included routine tasks such as creating, cloning, and taking snapshots of virtual machines, as well as more complex tasks like configuring High Availability (HA) and Distributed Resource Scheduler (DRS) settings for load balancing, failover contingencies, and optimizing resource usage across the enterprise. Aside from VMware, I have experience with other virtualization technologies as well. These include Microsoft's Hyper-V and open-source solutions like VirtualBox. This wide range of experience has given me a comprehensive understanding of virtualization, its benefits, and how to leverage it to maximize system efficiency and cost-effectiveness.

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Resource pools allow you to delegate control over resources of a host which are CPU and Memory. You can create Resource Pool and assign amount of resources to the virtual machines inside resource pool. A resource pool can contain child resource pools, virtual machines, or both. You can create multiple Resource Pools based on your requirement.

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vSAN is an approach used to create shared storage among VMs as it pools together the storage of ESXi hosts and divides them among different virtual machines. It can be used for both flash-based and magnetic disk storage.

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A30: When designing a vSphere cluster, several considerations come into play.

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A clone is a copy of a virtual machine. Cloning a VM will save time if multiple VMs with the same configurations are required to configure. A template is a master copy of an image created from a VM, which can be later used to create many clones. It can't be powered-on or edited after converting a VM to a template.

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vSphere 5 introduced several key improvements across its components, including: - ESXi Hypervisor Enhancements: Support for hot-pluggable PCIe SSD devices allows adding or removing storage devices without downtime. Reliable Memory Technology support improves VMkernel's ability to manage memory, protecting against memory errors. Enhancements to CPU C-states reduce power consumption by managing CPU power-saving states more effectively. - Virtual Machine Enhancements: New features in VM hardware and tools improve performance, security, and compatibility. - vCenter Server and Storage Enhancements: Improved management and automation features enable better resource utilization and operational efficiency. - Networking Enhancements: Increased scalability and new features enhance virtual network management.

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NFS (Network File System) is a distributed file system protocol commonly used in VMware environments for accessing shared storage over a network. In VMware, NFS datastores provide a scalable and cost-effective storage solution for virtual machines. NFS allows multiple ESXi hosts to access the same NFS volume concurrently, enabling features like vMotion and High Availability (HA). It simplifies storage management and provisioning while delivering good performance for virtualized workloads.

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The default mode is Reject. If Accept is selected, the host will not compare the source and effective MAC address transmitted from a Virtual Machine.

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A7: A snapshot in VMware is a copy of the virtual machine's state at a specific point in time. It includes the VM's system state and data, allowing you to revert to that state if needed. Here's how they're used.

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The process of making virtual versions of physical elements I-e Servers, Storage Devices, Network Devices on a physical host is named virtualization. Virtualization permits you to run multiple virtual machines on one physical machine that is named ESXi host.

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Yes, I have had experiences of implementing VMware infrastructure from scratch, and it requires careful planning and execution. Starting, a clear understanding of the business needs and project requirements is vital. This helps determine the capacity planning for compute, storage, and networking resources. Next, I would design the network layout, considering factors like network segregation for different types of traffic (management, vMotion, storage, VM traffic), and necessary redundancy. For the storage architecture, it will depend on the requirements and existing infrastructure. We might go for a local storage setup using vSAN, or a network storage setup using NFS or iSCSI. Once the hardware is set up and network connectivity has been established, I would install the VMware ESXi on each server. After that, I would set up the vCenter server, either as an appliance or on a Windows server, which would act as the centralized management point. With vCenter up, I would add all the ESXi hosts to vCenter and create datacenters and clusters as planned. I'd also configure the high availability and DRS settings for each cluster. Post the cluster configuration, I would configure shared storage and vMotion. Then the network would be set up, including the switch configuration and VMkernel adapters. Finally, the creation of Virtual Machines starts based on the application requirements. These can then be tweaked for their resource allocation and network settings. This is a broad-level overview, the in-depth details could vary based on the precise requirements, the organizational standards and practices, and existing IT infrastructure. And, as with all complex IT projects, thorough documentation, regular monitoring and maintenance after the setup are important to keep everything running smoothly.

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VMotion could also be a key enabling technology for creating the dynamic, automated, and self-optimizing data centre. We used VMware VMotion because it enables the live migration of running virtual machines from one physical server to a special one with zero downtime, continuous service availability, and complete transaction integrity.

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A network of VMs running on a physical server that is connected logically with each other is called virtual networking.

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Storage vMotion is a feature in VMware that enables live migration of virtual machine disk files within and across storage arrays. It's essentially a way of moving a running VM's disk files from one storage location to another with zero downtime and no effect on user experience. When a Storage vMotion is initiated, the contents of the VM's memory and the state of its processor registers are not moved, unlike a standard vMotion. Instead, it starts by creating a new copy of the VM's disk file on the target datastore. It then migrates the disk data while the VM is still running. All this happens without the VM's OS and hosted applications knowing anything about it. During this process, all the disk reads and writes go to the original disk file, while the changes that occur during the migration are simultaneously recorded in a log file. This ensures that no data is lost during the migration. After all data from the initial disk state is moved, the VM briefly gets stunned and the delta data held in the log file is committed to the new disk file, completing the switch to the new disk. Storage vMotion is an integral part of smart storage management and balance the I/O load among several storage systems, assisting in storage array upgrades or replacements without any service disruption.

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We can configure several settings for vApp, such as CPU and memory allocation, and IP allocation policy, etc.

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System automation is a time saver and a way to ensure consistency in repetitive tasks. Languages like Python and Bash, along with tools like Ansible and Puppet, have featured significantly in my tasks.

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- VMware: A leading virtualization platform known for its enterprise-grade features, scalability, and reliability. VMware offers a range of products for server, desktop, and network virtualization. It's suitable for large organizations and mission-critical applications. - VirtualBox: A free and open-source virtualization software, widely used for personal and educational purposes. It's a good option for home users and developers who want to test different operating systems or applications in a safe environment. - Comparison: - Pricing: VMware is a commercial product with licensing fees, while VirtualBox is free. - Features: VMware offers advanced features like high availability, disaster recovery, and management tools, while VirtualBox provides basic virtualization functionality. - Scalability: VMware is designed for large-scale deployments and can handle many VMs, whereas VirtualBox is more suitable for smaller deployments.

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Securing a virtualized environment involves multiple levels of strategy. The first line of defense is regular patching and updates. Both the host systems and the guest operating systems need to be kept current to protect against potential vulnerabilities. Access control is another critical area. I typically enforce strict role-based access controls for administrators and users. This includes limiting permissions to create, modify, or interact with VMs based on user roles, ensuring that only authorized personnel can perform specific actions. Virtual networking also requires careful consideration. I usually segregate sensitive traffic, like data and management traffic, onto separate virtual networks and only permit necessary communication between VMs to minimize potential attack surfaces. In addition, using VM encryption and setting up a robust firewall can provide an additional layer of security. Lastly, regularly backing up data and implementing disaster recovery measures ensure that even if some form of security breach occurs, the critical data is safeguarded, and services can be restored quickly. As with any security practice, vigilance and regular audits are key as security is an ongoing process.

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VMware HA guarantees failover, which means VMs are started on alternate hosts in case of a failure of the original one. This is a structure that prevents downtime, either from hardware or from software failure.

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A virtual network provides a secure and isolated network environment for virtual machines. It allows VMs to communicate with each other and with the physical network, but it also provides isolation and control over network traffic. Virtual networks help in managing network resources, implementing security policies, and creating flexible network topologies.

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In my prior internship, I was responsible for writing a performance-critical service that interfaced with the database. I underestimated the scale and wrote a loop that made one SQL query per record. In staging tests, the service worked well, but on a higher load, it became a bottleneck in production simulation. When it broke, I paused new requests and rewrote the logic to batch queries and use indexing. The response time improved by 70%, and I added unit tests to prevent regressions. I learned to always simulate a realistic scale early and plan for performance from day one.

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In a cold migration, a Virtual Machine is turned off, and then it's moved to a different physical host or data store. The VM's power is OFF, and it doesn't require shared storage. This method doesn't involve checking the CPU, and it can take a while. Log and configuration files are transferred from the original host to the new one. Once the VM is on the new host, it's powered on. Any applications and the operating system are stopped before the move, and the user can decide whether to move the associated disks to a different data store. In a hot migration, a Virtual Machine that's already powered on is moved from one physical host to another. The state of the original host is cloned to the destination host and then discarded on the source host. The complete state of the VM is transferred to the new host. This method requires shared storage and involves CPU checks. It's relatively fast, with minimal downtime. There's no need to stop the operating system or applications; they seamlessly shift from the virtual to the physical machine. This approach allows for freeing up physical servers for maintenance and balancing workloads for optimal performance among physical servers. Clients can continue without significant interruptions.

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VMware HA is often used in conjunction with VMware Distributed Resource Scheduler (DRS). While HA focuses on availability by restarting VMs after failures, DRS optimizes resource distribution dynamically across hosts based on workload demands. When combined, HA and DRS provide a powerful solution that ensures both continuous availability and efficient resource utilization. For example, after HA restarts VMs on surviving hosts, DRS can rebalance the cluster by migrating VMs to maintain optimal performance and avoid resource contention.

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The steps are: - Browse to the data-store cluster within the vsphere Client. - Click the Configure tab and click on Services. - Select Storage DRS and click on Edit. - Select activate vSphere DRS and click on OK. An optional step is to disable only I/O-related functions of Storage DRS, leaving space-related controls enabled then perform the subsequent steps.

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DRS tuning and manual vMotions.

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Click Edit Menu on VC and choose shopper Settings to alter VI settings Click Administration Menu on VC and choose VC Management Server Configuration to alter VC Settings.

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- Virtual Machine: A software-based emulation of a physical machine, including the operating system and applications. - Virtual Disk: A file that acts as a storage device for a VM, allowing it to access and store data as if it were on a physical hard drive.

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Resposta de referência

ESXi Shell may be a command-line interface to run medical specialty and repair of vSphere ESXi hosts. ESXi Shell by DCUI or through vCenter Server to modify and disable, and might even be accessed remotely via SSH. For a lot of data, see the ESXi Management page.

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Resposta de referência

High Availability is referred as HA in VMware. HA works on the Cluster level. VMware HA provides high availability for virtual machines by pooling them and the hosts they reside on into a cluster. Hosts in the cluster are monitored and in the event of a failure, the virtual machines on a failed host are restarted on alternate hosts.

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A VMware snapshot is a copy of a VM disk file at a certain point in time which is used to restore the system to that point in case of a system failure. It is done using the Revert and Attend command.

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A VLAN (Virtual Local Area Network) is a network segmentation technique that separates network traffic into distinct broadcast domains, improving security and reducing congestion. In VMware environments, VLANs can be configured at the virtual switch level, allowing administrators to isolate traffic between virtual machines (VMs). This isolation ensures that VMs on different VLANs cannot directly communicate, enhancing security.

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Snapshots in VMware capture the state and data of a virtual machine at a specific point in time. They are used for backup purposes, testing, and recovery. Snapshots include the disk state, memory state, and power state of the VM, and they allow you to revert back to that state if needed.

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Version 11

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VMware Cloud Foundation provides an integrated software platform for vSphere, vSAN, NSX, and vRealize Suite that is intended for private and hybrid clouds.

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VMware Tools is a set of utilities installed on virtual machines to improve performance and manageability. It includes drivers for optimized graphics, network communication, and time synchronization.

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Virtual LANs (VLANs) enable a single physical LAN segment to be further segmented so that groups of ports are isolated from one another as if they were on physically different segments. You can configure VLANs in ESXi using below 3 Methods: External Switch Tagging (EST): With EST, all VLAN tagging of packets is performed on the physical switch. Host network adapters are connected to access ports on the physical switch. Port groups that are connected to the virtual switch must have their VLAN ID set to 0. Virtual Switch Tagging (VST): With VST, all VLAN tagging of packets is performed by the virtual switch before leaving the host. Host network adapters must be connected to trunk ports on the physical switch. Port groups that are connected to the virtual switch must have an appropriate VLAN ID specified. Virtual Guest Tagging (VGT): With VGT, all VLAN tagging is performed by the virtual machine. VLAN tags are preserved between the virtual machine networking stack and external switch when frames are passed to and from virtual switches. Physical switch ports are set to trunk port.

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Resposta de referência

LUN stands for Logical Unit Number. LUN could also be a logical section of storage. A LUN is often one disk or multiple disks, and it can also be allocated from a disk pool or disk volume relying on the storage vendor's terminology. A data store could also be a representation VMware uses for an area of storage that virtual machines can reside on.

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The Edge gateway services interconnect your logical networks with your physical networks. This means a virtual machine connected to a logical network can send and receive traffic directly to your physical network through the gateway.

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A39: Here are some best practices for capacity planning.

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- Thick Provisioned Disk: Allocates the full disk space to the VM immediately, even if it's not fully used. It provides better performance but uses more storage. - Thin Provisioned Disk: Allocates storage space on demand. It saves storage space but may lead to slower performance if the VM requires a large amount of space quickly.

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Resposta de referência

Cold Migration: In this migration, the powered-off VM, along with its configuration and data, is migrated from one host to another host. The VMs can be migrated manually, or one can set up scheduled tasks to perform this migration. Hot Migration: In this migration, the powered-on VM is migrated from one host to another. This is also known as live migration because there is no need to shut down the virtual machine.

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A virtual appliance is a pre-configured virtual machine image designed for a specific application or service. It simplifies deployment by including both the application and its necessary environment.

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Storage virtualization abstracts physical storage resources into a single virtual storage pool. It simplifies management, improves storage utilization, and enables features like thin provisioning and dynamic allocation.

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VCenter integrates with Active Directory and other identity providers for authentication, using RBAC to control user access. When I helped a university admin team set up lab access, we used RBAC to ensure students could power on their VMs but not alter host settings. It prevented accidental misconfigurations and taught me how RBAC keeps big environments both secure and manageable.

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- Storage DRS (Distributed Resource Scheduler) is a feature in VMware vSphere that automates the management of storage resources. - It dynamically balances the storage load across multiple datastores to ensure optimal performance and utilization. - Storage DRS works by continuously monitoring the I/O load on each datastore and migrating virtual machine disks between datastores as needed to maintain balance. - It considers factors like latency, space usage, and I/O throughput to make intelligent migration decisions, improving performance and efficiency in virtualized environments.

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Resposta de referência

VMware Workstation supports the creation of three network types: Bridged, Network Address Translation (NAT), and Host-Only. The Bridged network type directly connects the VM to the network that the host is connected to. This means your VM acts as a unique device on the network, with its own IP address visible on the network, separate from the host. You would use this type when you want your VM to appear as a full-fledged device on your network, enjoying all the same network access as a physical machine would. The NAT network type allows the VM to share the IP address of the host on your network but maintains a separate subnet for VMs. This way, the VM can access the same network resources as the host, but isn't directly visible on the network. You would use this type if you need your VM to access the Internet or network resources while staying isolated from the rest of the network. The Host-Only network type sets up a network that is completely isolated from the host's network. It only allows network connections between VMs on the same host. This is useful when you're creating a secure, closed network for testing, and you don't want your VMs to communicate with the rest of the network or internet. Each of these network types has its own specific use-cases, and you would choose between them based on your needs and the level of network access and isolation required.

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Resposta de referência

Fibre Channel over Ethernet or FCoE may be a transport standard that takes Fibre Channel frames and encapsulates them within an enhanced Ethernet network. FCoE retains Fibre Channel upper-level protocol features like flow control and data integrity checking but not its cables and interfaces.

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Resposta de referência

The administrator should choose vCenter Single Sign-On with Active Directory (Windows Integrated Authentication) as the identity source. This solution supports Enhanced Link Mode groups, allows integration with a single Active Directory domain, and adheres to the domain's password and account lockout policies. It also supports token-based authentication, meeting all the specified criteria.

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Resposta de referência

Full virtualization & para virtualization both comes under the Hardware virtualization. Some of the difference between them are listed below : Full Virtualization : It is a virtualization in which guest machine(virtual machines) is unware that it is in virtualized environment therefore hardware is virtualized by the host operating system so that the guest can issue commands to what it thinks is actual hardware but really are just simulated hardware devices created by the host Para Virtualization : It is a virtualization in which guest machine is aware that it is in virtualized environment . If guest machine require resources like memory & cpu , it issues command to guest operating system instead of directly communication with actual hardware.

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Tools, cutover plan, test runs.

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The administrator should configure Enhanced Linked Mode. This feature allows multiple vCenter Server instances to be linked together, enabling centralized management of multiple sites through a single vSphere Client session.

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Virtual switches act as a network switch within a virtual infrastructure. Configuring these entails connecting the virtual machine's network adapters to appropriate interfaces and managing network traffic policies.

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I use VMware vRealize Operations as my primary monitoring tool—it gives me visibility into CPU, memory, disk, and network metrics across all VMs. I've also set up alerts for when CPU or memory utilization consistently exceeds 80%, so I catch issues before they become problems. When I suspect a bottleneck, I start with the host level. If a VM is slow, is it because the host is resource-constrained, or is it the VM itself? Then I drill into the specific VM—what's the CPU usage, memory pressure, disk queue length, and network traffic? The tools show me this, but you also have to think critically about the application. For example, I had a reporting VM that was consistently slow. vRealize showed high disk I/O wait times. I checked the storage and found the LUN was oversaturated because we'd put too many VMs on it. We rebalanced VMs across LUNs, and performance improved immediately. I also use capacity trending to see if we're growing toward limits. If memory usage is climbing 10% per month, I can request additional resources with data to back it up.

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1. Configure a Master Host/Reference Host. 2. Configure a Host Profile based on that Host. 3. Attach the Profile to a Host or Cluster. 4. Check the host or Cluster's Compliance to that profile 5. Apply the profile to the host or all hosts of the cluster (remediate).

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The administrator should create a VM/Host affinity rule specifying that VMs in the DB group must run on hosts in the PROD1 group. This rule ensures that the VMs will primarily operate on the PROD1 hosts. If these hosts go offline, the rule should be set to allow the VMs to run on the PROD2 hosts, providing a fallback option to maintain operations during maintenance or outages.

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East-west traffic is traffic between virtual machines within a data center. In the current context, this typically will be traffic between logical switches in a VMware environment.

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"When I needed to learn about VMware vSphere for a project, I started by accessing online courses and the official documentation. I set a structured plan to study specific topics daily. After gaining theoretical knowledge, I set up a lab environment to practice creating and managing VMs. Applying what I learned in a real scenario helped me understand the technology better. As a result, I successfully contributed to the project, and this experience reinforced my ability to learn quickly and effectively."

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Below are the two monitoring methods used for VSphere HA; - Data Store heartbeat - Network heartbeat.

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VMware FT (Fault Tolerance) in vSphere ensures continuous availability for virtual machines by creating a secondary VM that mirrors the primary in real-time. If a host failure occurs, the secondary VM instantly takes over without disruption. This process guarantees uninterrupted operation and maintains data integrity, providing a high level of protection for critical applications. It supports up to 4 vCPUs per VM, making it suitable for important workloads.

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The comparison of the virtual switch and physical switch are: | Virtual Switch | Physical Switch | | A virtual switch operates within the hypervisor to manage VM traffic. | A physical switch manages network traffic between physical devices. | | Managed via vSphere client or CLI. | Managed through a physical network management interface. | | Handles traffic between virtual machines. | Handles traffic between physical devices and networks. |

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The VMware snapshot is used to preserve the state and data of the Virtual machine at the present point in time, so once you are done testing, you'll quickly revert the VM back to the desired state. In VMware, VMware snapshots are easy and quick thanks to saving the state of a virtual machine before you test a software update, patch or other change.

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Resposta de referência

The process of creating virtual versions of physical components, i.e., Servers, Storage Devices, Network Devices on a physical host, is called virtualization. Virtualization lets you run multiple virtual machines on a single physical machine which is called ESXi host.

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There are thanks to enable NUMA in VMware which is: - Configure one virtual machine to use hyper-threading with NUMA, add NUMA and VCPU. - Click on the VM option then select Edit Settings. - Now configure all virtual machines to use hyper-threading with NUMA. Add numa then configure PreferHT=1 for per-host advanced configuration file.

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There are various kinds of VMware virtualizations available such as; - Presentation virtualization - Network virtualization - Application virtualization - Storage virtualization

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Common challenges during VM deployment include: - Hardware Compatibility: Ensuring that VM hardware settings are compatible with the guest operating system. - Network Configuration: Configuring virtual network settings to provide proper connectivity for VMs. - Storage Allocation: Selecting the appropriate type and size of virtual disks for VMs. - Guest OS Installation: Installing the guest operating system on the VM and configuring it for use.

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VM sprawl is something I've seen waste resources and complicate management. I approach it from a few angles. First, governance: I work with the team to establish a clear provisioning process. Before someone spins up a new VM, they document its purpose, owner, and expected lifespan. No 'temporary test' VMs that live for five years. Second, regular audits. I run reports in vCenter showing CPU and memory utilization over the last 30 and 90 days. Any VM running consistently below 10% utilization is a candidate for decommissioning or consolidation. I work with the owner to understand why—sometimes it's a legitimate standby server; sometimes it's been forgotten. Third, automation and policies. I've set up automated retirement policies where test VMs are deleted after 30 days if not explicitly renewed. It sounds harsh, but it's effective. In my last role, we had about 400 VMs. After an audit, we found about 80 that were essentially zombies—unused or forgotten. We consolidated or removed them, which freed up resources and reduced our licensing costs by about 15%.

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DRS dynamically allocates and balances computing resources across a cluster of ESXi hosts. It monitors the resource usage of ESXi hosts and migrates VMs to other hosts to ensure optimal performance and resource utilization.

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The configuration process involves setting up the ESX host, connecting to shared storage via Fibre Channel or iSCSI, configuring virtual switches for network connectivity, and using VirtualCenter for centralized management. Detailed steps include installing the ESX software, adding licenses, and creating virtual machine templates.

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Tanzu is a suite of products for building, running, and managing cloud-native applications.

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VMware aids in modernization by enabling businesses to adopt cloud-native development and DevOps practices, accelerate cloud adoption, and streamline multi-cloud environments. Tools like Tanzu Mission Control and Tanzu Observability enhance operational efficiency, while VMware Cloud on AWS provides flexibility in moving workloads between on-premises and cloud environments. VMware also ensures security and scalability during the digital transformation journey.

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Resposta de referência

Virtualization is the process of creating a virtual or software-based representation of something, such as virtual applications, servers, storage and networks. Virtualization relies on software to simulate hardware functionality and create a virtual computer system. This enables IT organizations to run more than one virtual system – and multiple operating systems and applications – on a single server. The resulting benefits include economies of scale and greater efficiency.

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Resposta de referência

VMware offers both perpetual and subscription licenses for its products. Perpetual licenses provide indefinite usage rights for a specific version of the software, with optional support and maintenance subscriptions for access to updates and technical support. Subscription licenses offer usage rights for a specified term (e.g., one year), with access to software updates and support included in the subscription fee. Customers can choose the licensing model that best suits their budget and deployment preferences.

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- Storage multipathing in VMware is the process of configuring multiple physical paths between ESXi hosts and storage arrays to provide redundancy and load balancing. - VMware ESXi supports various multipathing policies, such as Most Recently Used (MRU) and Round Robin, which determine how I/O requests are distributed across multiple paths. - Administrators can configure multipathing settings using the vSphere Client or command-line tools, ensuring high availability and performance for storage access in virtualized environments.

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Force sync is a feature that synchronizes the Edge configuration from the NSX Manager to all of its components in an environment. A synchronization action is initiated from the NSX Manager to the NSX Edge that refreshes and reloads the Edge configuration.

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- VMware alarms are notifications that alert administrators to potential issues or events in a VMware environment. - Alarms can be configured to monitor various conditions, such as CPU or memory usage, datastore latency, or virtual machine state changes. - When a monitored condition triggers an alarm, administrators receive alerts via email, SNMP traps, or vCenter Server notifications, allowing them to take corrective action before problems escalate.

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Resposta de referência

During my internship at Cisco, I was tasked with analyzing a performance issue in a VM monitoring dashboard. The queries fetching real-time CPU utilization were taking almost three seconds to render. After profiling, I found the bottleneck was in the JOIN between our metrics and VM tables. I implemented indexing on VM IDs and added a Redis caching layer for repeated queries, which reduced the response time to under 400 ms. That experience gave me hands-on insight into how even small architectural tweaks can significantly improve system responsiveness.

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Share: A value that specifies the relative priority or importance of a VM access to a given resource. Limit: Consumption of a CPU cycle or host physical memory that cannot cross the defined value (limit). Reservation: This value is defined in the form of CPU or memory and must be available for a VM to start.

177

Resposta de referência

Hypervisor is a virtualization layer that enables multiple operating systems to share a single hardware host. Each VM or operating system is allocated physical resources such as CPU, memory, storage, etc by the host. Below are the two types of hypervisors Hosted hypervisor (works as VMware Workstation(application)) Bare-metal (is virtualization VMvisor (software), Hyper-V which is installed directly onto the hardware and controls all physical resources).

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Virtualization is the process of creating a virtual version of a physical resource, such as a server, operating system, or storage device. It allows you to run multiple operating systems or applications on a single physical machine, isolating them from each other and making them appear as separate entities. This helps in better resource utilization, cost savings, and improved flexibility.

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The content library is a virtual space that stores VM templates, scripts, etc., and shares them between different geographical locations. It enables consistency, efficiency, and security. There are three types of content libraries: Local, published and subscribed. Each of them has a storage size of up to 64TB and a limit of 256 items.

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A virtual machine provisioning policy defines the rules and guidelines for creating and configuring virtual machines. It includes specifications for resource allocation, VM templates, and deployment procedures.

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- Performance Overhead: Virtualization can introduce performance overhead compared to running directly on physical hardware. - Security Risks: Virtual environments can be vulnerable to security threats if not properly managed. - Resource Contention: Multiple VMs sharing physical resources can lead to contention and performance issues. - Complex Management: Managing a large number of virtual machines and environments can be complex.

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Different types of virtual networking include: - NAT (Network Address Translation): Translates the IP addresses of VMs to the host's IP address, allowing VMs to access the internet but not vice versa. - Bridged Networking: Allows VMs to access the physical network directly, with their own unique IP addresses. - Private Network: Creates a private network isolated from the physical network, allowing VMs to communicate with each other only.

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Resposta de referência

VMware's VMotion technology enables you to migrate active virtual machines from one ESX-host to another without disrupting service or functionality. During this process, there is zero downtime, constant service availability, and overall transaction integrity. vMotion technology plays a key role in creating a dynamic, automated, and self-optimizing data center and provides great flexibility for virtual environments. Ensure that both hardware and software requirements are met by the cloud provider. The compatibility requirements are reduced if powered-off VMs are migrated.

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First, I'd confirm the VM is actually down and assess the impact. Is it affecting users? How many? How critical is the application? This helps me prioritize. My immediate steps: - Check if the VM is still running in vCenter. If not, I'd try a quick restart. If it comes back, I'd immediately start investigating why it went down. - Check the hypervisor logs to see if there was a crash, resource exhaustion, or other failure. - Check the guest OS logs once the VM is back up to understand what caused the failure. If the VM won't restart cleanly, I'd recover it from the most recent backup—we maintain hourly snapshots for critical VMs—and run it from the backup while I investigate the original. In parallel, I'd communicate. I'd notify my manager and the application owner immediately, even if I'm still investigating. People want to know what's happening, not hear radio silence. Once the VM is back up and users are unblocked, then I do root cause analysis. Was it a hardware issue? A software crash? Resource exhaustion? Once I understand the cause, I prevent recurrence—maybe that means adding monitoring, increasing resources, or working with the application team to fix a memory leak. I had this happen once with a database server. It crashed due to a memory leak in the application. We restarted it, got it back online quickly, but the fix was working with the developer to patch the app so it didn't happen again.

185

Resposta de referência

Security is paramount in a virtual environment. Regular vulnerability assessments, application of patches, and isolating virtual networks are crucial in minimizing security risks.

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Fault tolerance is a VMware system that guarantees continuous access to applications, avoids split-brain to occur, and enables zero downtime and zero data loss in case the ESX server fails. FT logging traffic is a port setting in VMKernel that is used to move irresolute events from primary VMs to secondary VMs.

187

Resposta de referência

vSphere 5.0 involves a replacement HA architecture. HA has been rewritten from the bottom up to shed a number of those constraints that were enforced by AAM. HA, as a neighbourhood of 5.0, also mentioned as FDM (fault domain manager), introduces less complexity and better resiliency. From a UI perspective, not tons have changed, but there are tons under the covers that have changed. Though no more primary/secondary node concept as stated but a master/slave concept with an automated election process.

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Resposta de referência

VXLAN is a layer 2 over layer 3 tunneling protocol that allows logical network segments to extend on routable networks. This is achieved by encapsulating the Ethernet frame with additional UPD, IP, and VXLAN headers. Consequently, this increases the size of the packet by 50 bytes. Hence, VMware recommends increasing the MTU size to a minimum of 1,600 bytes for all interfaces in the physical infrastructure and any associated vSwitches.

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Resposta de referência

- VMware's approach to endpoint security focuses on protecting virtualized desktops and applications accessed by end-users. - It includes features such as VMware Horizon for virtual desktop infrastructure (VDI), AppDefense for application security, and VMware Carbon Black for endpoint protection. - By leveraging virtualization and advanced security technologies, VMware enhances endpoint security, simplifies management, and improves user experience across diverse endpoint devices and platforms.

190

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The administrator should use the “Resume” option in the vCenter Management Interface to continue the patch staging process. This option allows the staging to pick up from where the error occurred rather than starting over from the beginning.

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Helps in creating a dynamic, self-optimising data centre. Facilitates the software and hardware requirements between cloud provider and user. Is used to migrate VMs from one host to another.

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E1000: It is an Emulated version of the Intel 82545EM Gigabit Ethernet NIC, with drivers available in most newer guest operating systems, including Windows XP and later and Linux versions 2.4.19 and later. E1000E: It is an Emulated version of the Intel 82574 Gigabit Ethernet NIC. E1000E is the default adapter for Windows 8 and Windows Server 2012. VMXNET: It is Optimized for performance in a virtual machine and has no physical counterpart. Because operating system vendors do not provide built-in drivers for this card, you must install VMware Tools to have a driver for the VMXNET network adapter available. If VMware Tools is not installed in Guest Operating system this adapter will not be visible. VMXNET 2 (Enhanced): It is Based on the VMXNET adapter but provides high-performance features commonly used on modern networks, such as jumbo frames and hardware offloads. VMXNET 2 (Enhanced) is available only for some guest operating systems on ESX/ESXi 3.5 and later. VMXNET 3: A paravirtualized NIC designed for performance. VMXNET 3 offers all the features available in VMXNET 2 and adds several new features, such as multiqueue support (also known as Receive Side Scaling in Windows), IPv6 offloads, and MSI/MSI-X interrupt delivery. VMXNET 3 is not related to VMXNET or VMXNET 2. SR-IOV passthrough: It is Representation of a virtual function (VF) on a physical NIC with SR-IOV support. The virtual machine and the physical adapter exchange data without using the VMkernel as an intermediary. This adapter type is suitable for virtual machines where latency might cause failure or that require more CPU resources. SR-IOV passthrough is available in ESXi 6.0 and later for guest operating systems Red Hat Enterprise Linux 6 and later, and Windows Server 2008 R2 with SP2.

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Storage types, trade-offs.

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Match skills to job needs and outcomes.

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- VMware vSphere – Server virtualization platform. - VMware ESXi – Hypervisor that runs virtual machines. - VMware vCenter Server – Centralized management for VMware environments. - VMware NSX – Network virtualization and security platform. - VMware vSAN – Software-defined storage solution.

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It is a virtualized and emulator that runs programs and OS that is made for one machine on a different machine during the process of machine emulation. It can achieve very good performance by using dynamic translation.

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Interviews probe VMware Cloud on AWS, vSphere with Tanzu, hybrid networking, migration strategies, and integration with public cloud services. Expand: Be prepared to discuss lift-and-shift vs. re-platform approaches, connectivity (Direct Connect, VPN), identity integration, and operational differences. Mention cost implications and migration tools (HCX, HCX L2 extension) where relevant. Interviewers may ask about managing workloads across on-prem and cloud for DR or burst capacity. Takeaway: Demonstrate understanding of interoperability and operational trade-offs between private and public clouds.

198

Resposta de referência

Storage vMotion is a feature in VMware vSphere that enables live migration of virtual machine disks between datastores without downtime. It allows administrators to move virtual machines to different storage locations for purposes like load balancing, hardware maintenance, or storage upgrades. Storage vMotion transfers virtual machine disk files while the virtual machine remains powered on and accessible to users, ensuring continuous availability and eliminating disruptions to services.

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.vmx – Virtual Machine Configuration File .nvram – Virtual Machine BIOS .vmdk – Virtual Machine computer file .vswp – Virtual Machine disc space .vmsd – Virtual MAchine shot information .vmsn – Virtual Machine shot file .vmss – Virtual Machine Suspended State file .vmware.log – Current Log File .vmware-#.log – previous Log file

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The logical load balancer distributes incoming requests among multiple servers to allow load distribution while abstracting this functionality from end-users. The logical load balancer can also be used as high availability (HA) mechanism to ensure your application has the most uptime. An Edge services gateway instance must be deployed in order to enable the load balancer service.

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