JN0-352 Replaces JN0-351: New Juniper JNCIS-ENT Exam Guide for Enterprise Routing and Switching

Juniper Networks is updating its Juniper Networks Certified Specialist, Enterprise Routing and Switching certification with a new exam: JN0-352 Enterprise Routing and Switching, Specialist. Starting June 8, 2026, JN0-352 becomes the new exam for candidates pursuing the JNCIS-ENT certification, replacing the older JN0-351 exam. This update is important for network engineers, enterprise administrators, support engineers, and Junos professionals who are preparing to validate their routing and switching skills in Juniper enterprise environments.

The JNCIS-ENT certification sits at the specialist level in Juniper’s Enterprise Routing and Switching certification track. It is intended for candidates who already understand basic networking and Junos fundamentals and want to move deeper into enterprise routing, switching, configuration, and troubleshooting. Because JNCIA-Junos remains the prerequisite certification, candidates should first make sure they have a solid understanding of Junos OS, device configuration, routing basics, operational commands, and troubleshooting workflows before moving into JN0-352 preparation.

JN0-352 Replaces JN0-351 for JNCIS-ENT Certification

The most important change is the exam code transition from JN0-351 to JN0-352. Candidates who were studying for JN0-351 should review their exam schedule carefully and confirm whether they can still take the older exam before its retirement. After the transition, new candidates should focus directly on JN0-352 because it becomes the updated path for earning the JNCIS-ENT certification.

This replacement does not mean that the entire certification track has changed. JNCIS-ENT still validates enterprise routing and switching knowledge in Junos environments. However, the new exam reflects Juniper’s updated exam blueprint and current certification requirements, so relying only on old JN0-351 materials may leave preparation gaps. Anyone planning to test after the change should study according to the JN0-352 objectives rather than assuming the previous exam content is fully identical.

Key JN0-352 Exam Information

The JN0-352 exam continues to test both conceptual understanding and practical Junos skills. Candidates should not only memorize definitions but also understand how to configure, verify, monitor, and troubleshoot enterprise routing and switching features on Juniper platforms.

Key Differences Between JN0-351 and JN0-352

At a high level, both exams focus on Juniper enterprise routing and switching technologies. The difference is that JN0-352 is the updated version candidates should now follow. The exam still emphasizes core enterprise networking skills, but the safer preparation strategy is to align every study session with the latest JN0-352 blueprint instead of depending only on older JN0-351 notes.

Main Topics Covered in the JN0-352 Exam

The JN0-352 exam covers a wide range of enterprise routing and switching objectives. Candidates should be comfortable with Layer 2 switching concepts, VLAN operations, port behavior, tagging, native VLANs, voice VLANs, and inter-VLAN routing. These topics are important because enterprise networks often rely on properly designed and secured switching environments.

Spanning Tree is another key area. Candidates should understand STP and RSTP concepts, port roles, port states, BPDUs, convergence, reconvergence, and how to configure and troubleshoot spanning tree behavior in Junos. Layer 2 security is also important, including BPDU protection, loop protection, root protection, port security, MAC limiting, DHCP snooping, Dynamic ARP Inspection, IP source guard, MACsec, storm control, and Layer 2 firewall filters.

For routing, the exam includes protocol-independent routing, OSPF, IS-IS, and BGP. Candidates should understand static routes, aggregate routes, generated routes, routing instances, RIB groups, load balancing, filter-based forwarding, link-state routing concepts, neighbor relationships, routing policies, BGP attributes, route selection, IBGP, EBGP, and related troubleshooting tools.

The exam also includes IP tunneling and high availability. Candidates should review GRE, IP-IP tunneling concepts, tunnel configuration, monitoring, troubleshooting, LAG, RTG, Virtual Chassis, graceful restart, GRES, NSR, NSB, BFD, VRRP, ISSU, and common Junos troubleshooting commands. These topics help prove that a candidate can support reliable enterprise network operations, not just basic configuration tasks.

How to Best Prepare for JN0-352 JNCIS-ENT Exam

The best way to prepare for JN0-352 is to begin with the official exam objectives and turn each objective into a study checklist. Do not simply read through the topics once. Instead, break the blueprint into sections such as Layer 2 switching, VLANs, spanning tree, Layer 2 security, routing, OSPF, IS-IS, BGP, tunnels, and high availability. After studying each section, practice related configuration and verification commands in Junos.

Hands-on practice is especially important for this exam. Candidates should be able to configure VLANs, verify interface status, troubleshoot routing tables, check protocol neighbors, apply routing policies, review logs, use show commands, and understand traceoptions output. JNCIS-ENT is a specialist-level certification, so practical command familiarity can make a major difference during exam preparation.

Candidates should also compare their existing JN0-351 study materials with the JN0-352 blueprint. If a topic appears in the new objectives, keep it in the study plan. If an older resource does not clearly match the new exam, update it with newer training, documentation, or practice questions. Using updated JN0-352 practice questions from Passcert can also help candidates become familiar with the question style, identify weak areas, and improve exam readiness before scheduling the real test.

Suggested Study Plan for JN0-352 Candidates

A practical study plan should begin with Junos fundamentals and then move into enterprise switching. Spend time reviewing VLAN configuration, trunk/access ports, inter-VLAN routing, STP/RSTP, and Layer 2 security features. After that, move into routing topics such as static routing, routing instances, OSPF, IS-IS, and BGP. For each protocol, focus on both theory and troubleshooting.

In the final stage, review tunnels and high availability. These topics are often easier to overlook, but they are important for real enterprise networks. Candidates should also complete several rounds of practice questions, review incorrect answers carefully, and return to Junos documentation or lab practice when they discover weak areas. The goal is not only to answer questions correctly but also to understand why the correct answer works in a Junos environment.

Conclusion

The replacement of JN0-351 with JN0-352 marks an important update for the Juniper JNCIS-ENT certification. While the certification continues to focus on enterprise routing and switching skills in Junos, candidates should now prepare with the latest JN0-352 exam objectives to avoid studying outdated materials. By reviewing the official blueprint, building strong hands-on Junos experience, practicing routing and switching troubleshooting, and using updated JN0-352 practice questions, candidates can prepare more effectively and improve their chances of earning the JNCIS-ENT certification successfully.