Juniper JNCIS-ENT (JN0-351) is an intermediate certification that focuses on practical applications of key technologies such as routing, switching, and high availability.

1. Introduction to the Juniper JNCIS-ENT (JN0-351) certification

Juniper JNCIS-ENT (JN0-351) is the core intermediate certification in the enterprise network direction of Juniper Networks' certification system, focusing on verifying practitioners' practical abilities in configuring, operating, monitoring, and troubleshooting core routing, switching, security, wireless, and high availability technologies in enterprise level network environments.

JN0-351 is a key intermediate link in Juniper's enterprise network certification path, aimed at cultivating intermediate technical backbones who can independently cope with the core technical challenges of small and medium-sized enterprise networks. It is the core credential for transitioning from "basic network operation and maintenance" to "enterprise network experts."

The core requirements of enterprise networks are "stable internal interconnection, secure boundary protection, flexible access methods, and efficient operation and maintenance management." Unlike service provider networks, their technical applications focus more on campus network architecture, enterprise level security policies, wireless access, and simple interconnection between branches and headquarters.

The core of JNCIS-ENT certification is to cultivate "enterprise network practical intermediate technical engineers," who are not simply theoretical learners, but can proficiently use the Junos operating system to complete core technology configuration, daily operation and maintenance, and common troubleshooting for the core scenarios of enterprise networks, ensuring the efficient operation and business support of enterprise networks.

When building a park network for large group enterprises, JNCIS-ENT certification holders will design a three-layer network architecture of access layer aggregation layer core layer to achieve efficient interconnection of the park network; WLAN controller and AP provide wireless access services and configure wireless security policies for office areas; Enabling VRRP and BFD to enhance network high availability, implementing centralized device management through Junos Space, ultimately ensuring stable network access and business access for thousands of enterprise terminals.

2. The Rewards of Being a Juniper JNCIS-ENT (JN0-351)

JNCIS-ENT is an officially recognized intermediate qualification for enterprise networking by Juniper, applicable to large enterprises and Juniper partners. When recruiting intermediate enterprise network engineers and park network operation and maintenance positions, they are often listed as "priority conditions," which is the core indicator to distinguish between basic operation and maintenance and intermediate technical backbone. Internationally, the salary premium for certificate holders in multinational corporations is about 20%-30%.

JNCIS-ENT is a necessary prerequisite for obtaining professional and expert level certifications. Through this certification, one can systematically master the core technologies of enterprise networks, laying a solid foundation for future entry into the ranks of enterprise network experts.

Juniper JNCIS-ENT (JN0-351) certification covers the core technology applications of enterprise networks, and after passing it, it can prove the ability to independently complete network configuration and operation for small and medium-sized enterprises. Enterprises can directly arrange certified personnel to participate in core network projects without extensive pre job training, and can quickly undertake intermediate technical work after joining.

3. Core Components of the Juniper JNCIS-ENT (JN0-351) Certification

For those who are committed to deepening their skills in the enterprise network environment and becoming technical backbones capable of designing and managing medium to large campus networks and branch networks, Juniper Enterprise Network Intermediate Certification is a crucial and connecting professional qualification.

Juniper JNCIS-ENT (JN0-351) certification focuses deeply on the comprehensive technical system of modern enterprise networks, from wired to wireless, from access to core, from connectivity to security, aiming to comprehensively verify whether you have the full set of practical capabilities required to build an efficient, reliable, and secure enterprise network using Juniper devices.

As the logical core of the network, enterprise level routing technology requires mastery of deployment and optimization of protocols such as OSPF and BGP in enterprise scenarios, as well as the ability to implement IPv6 transition solutions, laying a solid foundation for network connectivity.

Enterprise level exchange technology is the focus of certification. You will gain a deep understanding of building a three-layer switching architecture, implementing VLAN isolation and interoperability, configuring advanced security features to prevent layer 2 attacks, and understand the preliminary concepts of data center edge switching.

The foundation of enterprise network security requires you to be able to deploy boundary security policies using Juniper SRX firewall, implement secure interconnection using IPsec/SSL VPN, and enable basic threat protection functions to build the first line of defense for enterprise networks.

Network high availability technology is crucial for ensuring business continuity. Certification requires you to master the implementation of VRRP gateway redundancy and MC-LAG link aggregation, and be able to configure BFD to achieve millisecond level fault detection, greatly improving network resilience.

From configuration to operation and maintenance, you need to understand efficient operation and maintenance through centralized management tools and SNMP protocol, and use logs and traffic analysis to achieve network visualization and auditability.

Troubleshooting and troubleshooting are the ultimate manifestation of comprehensive ability. You will hone the use of Junos commands and hierarchical troubleshooting methods to quickly locate and solve complex network failures across domains such as routing, switching, security, and wireless.

4. What are the requirements to be a Juniper JNCIS-ENT (JN0-351)?

(1) Qualification prerequisites:

The prerequisite for obtaining Juniper JNCIS-ENT (JN0-351) certification is that you need to first pass JNCIA Junos (JN0-105) certification and possess basic Junos operating system configuration and network basic operation and maintenance capabilities.

We recommend that you have 1-2 years of practical experience in enterprise networks, be familiar with the architecture and core technical concepts of campus networks and office networks, master advanced Junos CLI operations, and be able to independently complete basic configuration and troubleshooting of enterprise network equipment. 

(2) Training and examinations:

The JN0-351 exam consists of approximately 65 questions, including multiple-choice questions, situational analysis questions, and configuration simulation questions. The exam lasts for 90 minutes. Full score of 1000 points, reaching 650 points or above to pass. The exam fee is about $300, with slight differences in tax fees in different regions.

(3) Qualification maintenance:

The JN0-351 certificate is valid for 3 years, and you need to pass Juniper's higher-level certification or retake the JN0-351 exam within the validity period to renew the certificate's validity.

5. Comparable Certifications to Juniper JNCIS-ENT (JN0-351) Certification

• Cisco CCNP Enterprise (350-401)
• Huawei HCIP -Datacom
• Aruba Certified Network Professional (ACNP)