Juniper JN0-349 : Enterprise Routing and Switching, Specialist (JNCIS-ENT)

  • Exam Code: JN0-349
  • Exam Name: Enterprise Routing and Switching, Specialist (JNCIS-ENT)
  • Updated: Sep 19, 2026
  • Q & A: 112 Questions and Answers

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Juniper JN0-349 Exam Syllabus Topics:

TopicDetails
Topic 1
  • Demonstrate knowledge of how to configure, monitor, or troubleshoot high availability components
  • Native VLANs and voice VLANs
Topic 2
  • Describe the concepts, operation or functionality of OSPF
  • Demonstrate knowledge how to configure, monitor or troubleshoot OSPF
Topic 3
  • Demonstrate knowledge how to configure, monitor, or troubleshoot Spanning Tree
  • Identify the concepts, benefits or operation of Layer 2 firewall filters
Topic 4
  • Designated router (DR) and backup designated router (BDR)
  • Describe the concepts, benefits, operation, or functionality of the Spanning Tree Protocol
Topic 5
  • Unified In-Service Software Upgrade (ISSU)
  • Areas, interfaces and neighbors
  • Designated intermediate system (DIS)
Topic 6
  • Demonstrate knowledge how to configure, monitor or troubleshoot Layer 2 switching or VLANs
  • Convergence and reconvergence
Topic 7
  • Port security, including MAC limiting, DHCP snooping, Dynamic ARP inspection (DAI) or IP source guard
  • Inter-VLAN routing
  • Match criteria and actions
Topic 8
  • Identify the concepts, operation or functionality of various protocol-independent routing components
  • Routing instances, including RIB groups
Topic 9
  • Tunneling applications and considerations
  • Describe the concepts, benefits, or functionality of VLANs
  • BPDU, loop or root protection
Topic 10
  • Describe the concepts, operation or functionality of IS-IS
  • Static, aggregate, and generated routes
Topic 11
  • Demonstrate knowledge of how to configure, monitor or troubleshoot IS-IS
  • Demonstrate knowledge how to configure, monitor, or troubleshoot Layer 2 security
Topic 12
  • Identify the concepts, benefits or operation of various Layer 2 protection or security features
  • Layer 2 Switching or VLANs
Topic 13
  • Demonstrate knowledge of how to configure, monitor, or troubleshoot BGP
  • Protocol Independent Routing
Topic 14
  • Identify the concepts, operation, or functionality of Layer 2 switching for the Junos OS
  • Firewall filter configuration and application

Reference: https://www.juniper.net/us/en/training/certification/tracks/enterprise-routing-switching/jncis-ent.html

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