Free Cisco 400-007 CCDE Practice Questions 2026 Part1

Question #1

An enterprise network has two core routers that connect to 200 distribution routers and uses full-mesh iBGP peering between these routers as its routing method. The distribution routers are experiencing high CPU utilization due to the BGP process. Which design solution is the most cost effective?

A. Increase the memory on the core routers

B. Increase bandwidth between the core routers

C. Implement eBGP between the core and distribution routers

D. Increase the memory on the distribution routers

E. Implement route reflectors on the two core routers

View answer

Correct Answer: E

Question #2

A large enterprise cloud design team is evaluating cloud consumption models. What is an example of a typical PaaS limitation or concern?

A. AVendor lock-in

B. BRuntime issues

C. CLack of control

D. DMulti-tenant security

View answer

Correct Answer: A

Question #3

A small organization of 20 employees is looking to deliver a network design service for modernizing customer networks to support advanced solutions.-Project scope and weekly progress should be visualized by the management.-Always consider feedback and make changes accordingly during the project.-Should consider flexibility to change scope at the point of time.Which project methodology meets the requirements and have the least impact on the outcome?

A. LEAN

B. Six-Sigma

C. Scrum

D. Kanban

View answer

Correct Answer: C

Question #4

Which two impacts of adding the IP event dampening feature to a network design are true? (Choose two.)

A. It switches traffic immediately after a link failure

B. It improves overall network stability

C. It speeds up link failure detection

D. It protects against routing loops

E. It reduces the utilization of system processing resources

View answer

Correct Answer: BE

Question #5

An architect receives a business requirement from a CTO that states the RTO and RPO for a new system should be as close as possible to zero. Which replication method and data center technology should be used?

A. synchronous replication over geographically dispersed dual data centers via CWDM

B. ynchronous replication over geographically dispersed dual data centers via MPLS

C. synchronous replication over dual data centers via DWDM

D. ynchronous replication over dual data centers via Metro Ethernet

View answer

Correct Answer: D

Question #6

Refer to the exhibit.OSPF is running as the IGP to provide reachability to all AS100 networks. R3 and R4 are the current ABRs at the boundary of OSPF Area0 and Area1. Now BGP must be deployed within AS100 because it will be receiving Internet routes from its eBGP peers (the service provider) connected to R1 andR2. What is an optimal solution for this deployment to configure BGP relationships and redistribute BGP learned routes into OSPF?

A. R5 should be configured as a route reflector for R1, R2, R3 and R4

B. Confederation should be set up with R1, R5, and R3 in one sub AS, with R2 and R4 in another, and redistribution at R1 and R2

C. R1, R2, R3 and R4 must be set up with a neighbor relationship with R5 only

D. A full mesh should be deployed between all the routers with mutual redistribution to take place at R1 and R2

View answer

Correct Answer: A

Question #7

Refer to the exhibit.Traffic was equally balanced between Layer 3 links on core switches SW1 and SW2 before anintroduction of the new video server in the network. This video server uses multicast to send videostreams to hosts and now one of the links between core switches is over utilized Which designsolution solves this issue?

A. dd more links between core switches

B. ggregate links Layer 2 link aggregation

C. pply a more granular load- balancing method on SW1

D. pply a more granular load-balancing method on SW2

E. ilter IGMP joins on an over -utilized link

View answer

Correct Answer: B

Question #8

Refer to the exhibit. An engineer is designing the traffic flow for AS 111. Traffic from AS 111 should be preferred via AS 100 for all external routes. A method must be used that only affects AS 111. Which BGP attributes are best suited to control outbound traffic?

A. MED

B. community

C. local preference

D. AS path

View answer

Correct Answer: C

Question #9

Company XYZ is planning to deploy primary and secondary (disaster recovery) data center sites. Each of these sites will have redundant SAN fabrics and dataprotection is expected between the data center sites. The sites are 100 miles (160 km) apart and target RPO/RTO are 3 hrs and 24 hrs, respectively. Which twoconsiderations must Company XYZ bear in mind when deploying replication in their scenario? (Choose two.)

A. Target RPO/RTO requirements cannot be met due to the one-way delay introduced by the distance between sites

B. VSANs must be extended from the primary to the secondary site to improve performance and availability

C. VSANs must be routed between sites to isolate fault domains and increase overall availability

D. Synchronous data replication must be used to meet the business requirements

E. Asynchronous data replication should be used in this scenario to avoid performance impact in the primary site

View answer

Correct Answer: CE

Question #10

Refer to the exhibit. Which impact of using three or more ABRs between the backbone area and area 1 is true?

A. In a large-scale network, multiple ABRs can create microloops

B. Multiple ABRs reduce the CPU processing on each ABR due to splitting prefix advertisement between areas

C. Prefixes from the non-backbone area are advertised by one ABR to the backbone area

D. In a large-scale network, LSA replication, by all ABRs, can cause serious scalability issues

View answer

Correct Answer: D

Question #11

Company XYZ is redesigning their QoS policy. Some of the applications used by the company are real-time applications. The QoS design must give these applications preference in terms of transmission. Which QoS strategy can be used to fulfill the requirement?

A. weighted fair queuing

B. weighted random early detection

C. low-latency queuing

D. first-in first-out

E. Reveal Answer

View answer

Correct Answer: C

Question #12

Company XYZ network runs IPv4 and IPv6 and they want to introduce a multidomain, multicast-based network. The new design should use a flavor of PIM that forwards traffic using SPT. Which technology meets this requirement?

A. PIM-SSM

B. PIM-SM

C. BIDIR-PIM

D. PIM-DM

View answer

Correct Answer: A

Question #13

An architect receives a business requirement from a CTO that states the RTO and RPO for a new system should be as close as possible to zero. Which replication method and data center technology should be used?

A. ynchronous replication over geographically dispersed dual data centers via MPLS

B. ynchronous replication over dual data centers via Metro Ethernet

C. synchronous replication over geographically dispersed dual data centers via CWDM

D. synchronous replication over dual data centers via DWDM

View answer

Correct Answer: B

Question #14

Company XYZ, a global content provider, owns data centers on different continents. Their data center design involves a standard three-layer design with a Layer3-only core. HSRP is used as the FHRP. They require VLAN extension across access switches in all data centers, and they plan to purchase a Layer 2 interconnection between two of their data centers in Europe. In the absence of other business or technical constraints, which termination point is optimal for theLayer 2interconnection?

A. at the core layer, to offer the possibility to isolate STP domains

B. at the aggregation layer because it is the Layer 2 to Layer 3 demarcation point

C. at the access layer because the STP root bridge does not need to align with the HSRP active node

D. at the core layer because all external connections must terminate there for security reasons

View answer

Correct Answer: B

Question #15

How many fully established neighbour relationships exist on an Ethernet with five routers running OSPF as network type broadcast?

A.

B.

C. 0

D. 0

E.

View answer

Correct Answer: E

Question #16

An architect designs a multi-controller network architecture with these requirements:Achieve fast failover to control traffic when controllers fail.Yield a short distance and high resiliency in the connection between the switches and the controller.Reduce connectivity loss and enable smart recovery to improve the SDN survivability.Improve connectivity by adding path diversity and capacity awareness for controllers.Which control plane component of the multi-controller must be built to meet the requirements?

A. control node reliability

B. controller stale consistency

C. control path reliability

D. controller clustering

View answer

Correct Answer: C

Question #17

A European national bank considers migrating its on-premises systems to a private cloud offering in a non-European location to significantly reduce IT costs. What is a primary factor prior to migration?

A. data governance

B. additional latency

C. security

D. cloud connectivity

View answer

Correct Answer: A

Question #18

Refer to the exhibit. An engineer is designing the traffic flow for AS 111. Traffic from AS 111 should be preferred via AS 100 for all external routes. A method must be used that only affects AS 111. Which BGP attributes are best suited to control outbound traffic?

A. MED

B. community

C. local preference

D. AS path

View answer

Correct Answer: C

Question #19

Which statement about hot-potato routing architecture design is true?

A. Hot-potato routing is the preferred architecture when connecting to content providers

B. Hop-potato keeps traffic under the control of the network administrator for longer

C. OSPF uses hot-potato routing if all ASBRs use the same value for the external metric

D. Hot-potato routing is prone to misconfiguration as well as poor coordination between two networks

View answer

Correct Answer: A

Question #20

Which two control plane policer designs must be considered to achieve high availability? (Choose two.)

A. Control plane policers are really needed only on externally facing devices

B. Control plane policers can cause the network management systems to create false alarms

C. Control plane policers require that adequate protocols overhead are factored in to allow protocol convergence

D. Control plane policers must be processed before a forwarding decision is made

E. Control plane policers are enforced in hardware to protect the software path, but they are hardware platform-dependent in terms of classification ability

View answer

Correct Answer: DE

Question #21

Which purpose of a dynamically created tunnel interface on the design of IPv6 multicast services is true?

A. first-hop router registration to the RP

B. multicast source registration to the RP

C. multicast client registration to the RP

D. transport of all IPv6 multicast traffic

View answer

Correct Answer: D

Question #22

A designer is working with a large bank to redesign their network. The designer wants to minimize complaints regarding slow application response times across the WAN. It is suspected that currently traffic is not being classified and marked correctly somewhere in the network. Which tool should the designer recommend to validate quality of service mappings and use?

A. SNMP

B. IPFIX

C. IP SLA

D. protocol analyzer

E. NBAR

View answer

Correct Answer: B

Question #23

Refer to the exhibit. ACME Mining has four data centers in Santiago, Cape Town, Mumbai, and Beijing, full-mesh connected via a 400 Mb/s EVP-LAN. They wantto deploy a new mission-critical application with these requirements:* cluster heartbeat 2 MB/s continuous (250 KB/s)* cluster heartbeat one-way maximum latency 100 msThese are the current ping tests results between the four data centers:Which hosting data center pair can host the new application?

A. Mumbai and Beijing

B. Cape Town and Mumbai

C. Cape Town and Beijing

D. Santiago and Mumbai

E. Santiago and Beijing

F. Santiago and Cape Town

View answer

Correct Answer: B

Question #24

Company XYZ has a multicast domain that spans across multiple autonomous systems. The company wants to choose a technology that provides simplified and controlled approach to interconnecting the multicast domains. Which technology is the best fit for this purpose?

A. MSDP

B. PIM SSM

C. MPLS

D. PIM sparse mode

E. Reveal Answer

View answer

Correct Answer: A

Question #25

Feature-rich networks are complex network models that provide one or more features in addition to the network topology. In attributed networks, attributes are assigned to the nodes to describe the corresponding entities. For example, in a friendship network, the actors can be described by their genre and their age.

A. information network

B. heterogeneous network

C. temporal network

D. probabilistic network

E. multilayer network

F. location-aware network

View answer

Correct Answer: CE

Question #26

A BGP route reflector in the network is taking longer than expected to converge during large network changes. Troubleshooting shows that the router cannot handle all the TCP acknowledgements during route updates. Which action can be performed to tune the device performance?

A. Decrease the size of the small buffers

B. Increase the size of the large buffers

C. Increase the keepalive timers for each BGP neighbor

D. Increase the size of the hold queue

View answer

Correct Answer: D

Question #27

Refer to the exhibit. An engineer is designing the traffic flow for AS 111. Traffic from AS 111 should be preferred via AS 100 for all external routes. A method must be used that only affects AS 111. Which BGP attributes are best suited to control outbound traffic?

A. MED

B. community

C. local preference

D. AS path

View answer

Correct Answer: C

Question #28

Which function is performed at the access layer of the three-layer hierarchical network designmodel?

A. ault isolation

B. oS classification and marking boundary

C. eliability -

D. ast transport

E. edundancy and load balancing

View answer

Correct Answer: B

Question #29

Which management category is not part of FCAPS framework?

A. Performance

B. Authentication

C. Security

D. Fault-management

E. Configuration

View answer

Correct Answer: B

Question #30

You want to mitigate failures that are caused by STP loops that occur before UDLD detects the failure or that are caused by a device that is no longer sending BPDUs. Which mechanism do you use along with UDLD?

A. BPDU guard

B. root guard

C. loop guard

D. BPDU filtering

View answer

Correct Answer: C

Question #31

The campus consists of four main buildings with a single router at each location. A single Ethernet connection exists between each building. Which two EIGRP metrics should be made equal in the network redesign to ensure proper load sharing? (Choose two.)

A. Bandwidth

B. Load

C. Delay

D. Reliability

View answer

Correct Answer: AC

Question #32

An enterprise has identified these causes for inefficient CAPEX spending:

A. Build a financial control function that delivers high-quality reports on operational expenses for business insight and financial reporting

B. CxO-level staff must have a full technical understanding but the should not trust their technical leaders fully

C. Adopt new organizational models that promote real accountability for ROI

D. Marketing and product management divisions must reduce their CAPEX budgets significantly to drive the change

View answer

Correct Answer: C

Question #33

SD-WAN can be used to provide secure connectivity to remote offices, branch offices, campus networks, data centers, and the cloud over any type of IP-based underlay transport network. Which two statements describe SD-WAN solutions? (Choose two.)

A. Control and data forwarding planes are kept separate

B. Solutions allow for variations of commodity and specialized switching hardware

C. SD-WAN networks are inherently protected against slow performance

D. Solutions include centralized orchestration, control, and zero-touch provisioning

E. Improved operational efficiencies result in cost savings

View answer

Correct Answer: AD

Question #34

A multicast network is using Bidirectional PIM. Which two combined actions achieve high availability so that two RPs within the same network can act in a redundant manner? (Choose two.)

A. Advertise the two RP addresses in the routing protocol

B. Use two phantom RP addresses

C. Manipulate the multicast routing table by creating static mroutes to the two RPs

D. Control routing to the two RPs through a longest match prefix

E. Use Anycast RP based on MSDP peering between the two RPs

F. Manipulate the administrative distance of the unicast routes to the two RPs

View answer

Correct Answer: BD

Question #35

What are two examples of business goals to be considered when a network design is built? (Choose two.)

A. integrate endpoint posture

B. ensure faster obsolescence

C. minimize operational costs

D. reduce complexity

E. standardize resiliency

View answer

Correct Answer: CD

Question #36

Company XYZ network runs IPv4 and IPv6 and they want to introduce a multidomain, multicast-based network. The new design should use a flavor of PIM that forwards traffic using SPT. Which technology meets this requirement?

A. PIM-SSM

B. PIM-SM

C. BIDIR-PIM

D. PIM-DM

View answer

Correct Answer: A

Question #37

An architect designs a multi-controller network architecture with these requirements:-Achieve fast failover to control traffic when controllers fail.-Yield a short distance and high resiliency in the connection between the switches and the controller.-Reduce connectivity loss and enable smart recovery to improve the SDN survivability.-Improve connectivity by adding path diversity and capacity awareness for controllers.Which control plane component of the multi-controller must be built to meet the requirements?

A. control node reliability

B. control path reliability

C. controller state consistency

D. controller clustering

View answer

Correct Answer: B

Question #38

What are two design constraints in a standard spine and leaf architecture? (Choose two.)

A. Spine switches can connect to each other

B. Each spine switch must connect to every leaf switch

C. Leaf switches must connect to each other

D. Endpoints connect only to the spine switches

E. Each leaf switch must connect to every spine switch

F. Reveal Answer

View answer

Correct Answer: BE

Question #39

Software-defined networking architecture is used for cost-effective, adaptable, and easily manageable applications. In which two software-defined networks is SDN commonly used? (Choose two.)

A. wide area network

B. mobile network

C. metro network

D. application network

E. control network

F. Reveal Answer

View answer

Correct Answer: AE

Question #40

Which two conditions must be met for EIGRP to maintain an alternate loop-free path to a remote network? (Choose two.)

A. The Reported Distance from a successor is higher than the local Feasible Distance

B. A feasible successor must be present

C. The Reported Distance from a successor is lower than the local Feasible Distance

D. The Feasible Distance from a successor is lower than the local Reported Distance

E. The feasibility condition does not need to be met

View answer

Correct Answer: BC

Question #41

A BGP route reflector in the network is taking longer than expected to coverage during large networkchanges. Troubleshooting shows that the router cannot handle all the TCP acknowledgements duringroute updates. Which action can be performed to tune the device performance?

A. ncrease the size of the hold queue

B. ncrease the size of the large buffers

C. ecrease the size of the small buffers

D. ncrease the keepalive timers for each BGP neighbor

View answer

Correct Answer: A

Question #42

Refer to the table. A customer investigates connectivity options for a DCI between two production data centers to aid a large-scale migration project. The solutionmust provide a single 10G connection between locations and be able to run its own varying QoS profiles without service provider interaction based on themigration stages. All connectivity methods are at 10 Gbps. Which transport technology costs the least if the connectivity is required for just one year?

A. DWDM over dark fiber

B. Metro Ethernet

C. MPLS wires only

D. CWDM over dark fiber

View answer

Correct Answer: D

Question #43

Which component of the SDN architecture automatically ensures that application traffic is routed according to policies established by network administrators?

A. packet forwarding engine

B. northbound API

C. southbound API

D. SDN controller

View answer

Correct Answer: D

Question #44

Company XYZ has 30 sites running a legacy private WAN architecture that connects to the Internet via multiple high-speed connections. The company is now redesigning their network and must comply with these design requirements:•Use a private WAN strategy that allows the sites to connect to each other directly and caters for future expansion•Use the Internet as the underlay for the private WAN•Securely transfer the corporate data over the private WANWhich two technologies should be incorporated into the design of this network? (Choose two.)

A. PPTP

B. DMVPN

C. IPsec

D. GET VPN

E. S-VTI

View answer

Correct Answer: BC

Question #45

Which two features control multicast traffic in a VLAN environment? (Choose two.)

A. RGMP

B. PIM snooping

C. MLD snooping

D. pruning

E. IGMP snooping

View answer

Correct Answer: CE

Question #46

Refer to the table.A customer investigates connectivity options for a DCI between two production data centers. The solution must provide dual 10G connections between locations with no single points of failure for Day 1 operations. It must also include an option to scale for up to 20 resilient connections in the second year to accommodate isolated SAN over IP and isolated dedicated replication IP circuits. All connectivity methods are duplex 10 Gbps. Which transport technology costs the least over two years in this scenario?

A. CWDM

B. DWDM

C. MPLS

D. Metro Ethernet

View answer

Correct Answer: B

Question #47

In an OSPF network with routers connected together with Ethernet cabling, which topology typically takes the longest to converge?

A. partial mesh

B. full mesh

C. ring

D. squared

E. triangulated

View answer

Correct Answer: C

Question #48

An enterprise network has two core routers that connect to 200 distribution routers and uses full-mesh iBGP peering between these routers as its routing method. The distribution routers are experiencing high CPU utilization due to the BGP process. Which design solution is the most cost effective?

A. Increase the memory on the core routers

B. Increase bandwidth between the core routers

C. Implement eBGP between the core and distribution routers

D. Increase the memory on the distribution routers

E. Implement route reflectors on the two core routers

View answer

Correct Answer: E

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Free Cisco 400-007 CCDE Practice Questions 2026 Part1 | Cisco Certified Design Expert

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