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Updated: Sep 01, 2025

No. of Questions: 112 Questions & Answers with Testing Engine

Download Limit: Unlimited

Choosing Purchase: "Online Test Engine"
Price: $69.00 

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Juniper JN0-349 Exam Certification Details:

Exam NameEnterprise Routing and Switching Specialist
Sample QuestionsJuniper JN0-349 Sample Questions
Exam CodeJN0-349 JNCIS-ENT
Duration90 minutes
Exam RegistrationPEARSON VUE
Recommended TrainingJunos Intermediate Routing (JIR)
Junos Enterprise Switching (JEX)
Number of Questions65
Passing ScoreVariable (60-70% Approx.)
Exam Price$300 USD

Juniper JN0-349 Exam Topics:

SectionObjectives
IS-ISDescribe the concepts, operation or functionality of IS-IS
  • Link-state database
  • IS-IS PDUs
  • TLVs
  • Adjacencies and neighbors
  • Levels and areas
  • Designated intermediate system (DIS)
  • Metrics

Demonstrate knowledge of how to configure, monitor or troubleshoot IS-IS

  • Levels, interfaces and adjacencies
  • Additional basic options
  • Routing policy application
  • Troubleshooting tools (e.g., ping, traceroute, trace options, show commands, logging)
Layer 2 SecurityIdentify the concepts, benefits or operation of various Layer 2 protection or security features
  • BPDU, loop or root protection
  • Port security, including MAC limiting, DHCP snooping, Dynamic ARP inspection (DAI) or IP source guard
  • MACsec
  • Storm control

Identify the concepts, benefits or operation of Layer 2 firewall filters

  • Filter types
  • Processing order
  • Match criteria and actions

Demonstrate knowledge how to configure, monitor, or troubleshoot Layer 2 security

  • Protection
  • Port security
  • Storm control
  • Firewall filter configuration and application
Layer 2 Switching or VLANsIdentify the concepts, operation, or functionality of Layer 2 switching for the Junos OS
  • Bridging components
  • Frame processing

Describe the concepts, benefits, or functionality of VLANs

  • Ports
  • Tagging
  • Native VLANs and voice VLANs
  • Inter-VLAN routing

Demonstrate knowledge how to configure, monitor or troubleshoot Layer 2 switching or VLANs

  • Interfaces and ports
  • VLANs
  • Inter-VLAN Routing
TunnelsIdentify the concepts, requirements or functionality of IP tunneling
  • Tunneling applications and considerations
  • GRE
  • IP-IP

Demonstrate knowledge of how to configure, monitor or troubleshoot IP tunnels

  • GRE
  • IP-IP
  • Troubleshooting tools (e.g., ping, traceroute, trace options, show commands, logging)
Protocol Independent RoutingIdentify the concepts, operation or functionality of various protocol-independent routing components
  • Static, aggregate, and generated routes
  • Martian addresses
  • Routing instances, including RIB groups
  • Load balancing
  • Filter-based forwarding

Demonstrate knowledge how to configure, monitor, or troubleshoot various protocol-independent routing components

  • Static, aggregate, and generated routes
  • Load balancing
  • Filter-based forwarding
High AvailabilityIdentify the concepts, benefits, applications or requirements for high availability in a Junos OS environment
  • Link aggregation groups (LAG)
  • Redundant trunk groups (RTG)
  • Virtual Chassis
  • Graceful restart (GR)
  • Graceful Routing Engine switchover (GRES)
  • Nonstop active routing (NSR)
  • Nonstop bridging (NSB)
  • Bidirectional Forwarding Detection (BFD)
  • Virtual Router Redundancy Protocol (VRRP)
  • Unified In-Service Software Upgrade (ISSU)

Demonstrate knowledge of how to configure, monitor, or troubleshoot high availability components

  • LAG and RTG
  • Virtual Chassis
  • GR, GRES, NSB, and NSR
  • VRRP
  • ISSU
  • Troubleshooting tools (e.g., trace options, show commands, logging)
BGPDescribe the concepts, operation or functionality of BGP
  • BGP basic operation
  • BGP message types
  • Attributes
  • Route/path selection process
  • IBGP and EBGP functionality and interaction

Demonstrate knowledge of how to configure, monitor, or troubleshoot BGP

  • Groups and peers
  • Additional basic options
  • Routing policy application
  • Troubleshooting tools (e.g., ping, traceroute, trace options, show commands, logging)
Spanning TreeDescribe the concepts, benefits, operation, or functionality of the Spanning Tree Protocol
  • STP and RSTP concepts
  • Port roles and states
  • BPDUs
  • Convergence and reconvergence

Demonstrate knowledge how to configure, monitor, or troubleshoot Spanning Tree

  • STP
  • RSTP
OSPFDescribe the concepts, operation or functionality of OSPF
  • Link-state database
  • OSPF packet types
  • Router ID
  • Adjacencies and neighbors
  • Designated router (DR) and backup designated router (BDR)
  • OSPF area and router types
  • Realms
  • LSA packet types

Demonstrate knowledge how to configure, monitor or troubleshoot OSPF

  • Areas, interfaces and neighbors
  • Additional basic options
  • Routing policy application
  • Troubleshooting tools (e.g., ping, traceroute, trace options, show commands, logging)

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

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Frequently Asked Questions

What kinds of study material TopExamCollection provides?

Test Engine: JN0-349 study test engine can be downloaded and run on your own devices. Practice the test on the interactive & simulated environment.
PDF (duplicate of the test engine): the contents are the same as the test engine, support printing.

How long can I get the JN0-349 products after purchase?

You will receive an email attached with the JN0-349 study material within 5-10 minutes, and then you can instantly download it for study. If you do not get the study material after purchase, please contact us with email immediately.

How does your Testing Engine works?

Once download and installed on your PC, you can practice JN0-349 test questions, review your questions & answers using two different options' practice exam' and 'virtual exam'.
Virtual Exam - test yourself with exam questions with a time limit.
Practice Exam - review exam questions one by one, see correct answers.

Can I get the updated JN0-349 study material and how to get?

Yes, you will enjoy one year free update after purchase. If there is any update, our system will automatically send the updated study material to your payment email.

What's the applicable operating system of the JN0-349 test engine?

Online Test Engine can supports Windows / Mac / Android / iOS, etc., because it is the software based on WEB browser. You can use it on any electronic device and practice with self-paced.
Online Test Engine supports offline practice, while the precondition is that you should run it with the internet at the first time.
Self Test Engine is suitable for windows operating system, running on the Java environment, and can install on multiple computers.
PDF Version: can be read under the Adobe reader, or many other free readers, including OpenOffice, Foxit Reader and Google Docs.

How often do you release your JN0-349 products updates?

All the products are updated frequently but not on a fixed date. Our professional team pays a great attention to the exam updates and they always upgrade the content accordingly.

Do you have money back policy? How can I get refund if fail?

Yes. We have the money back guarantee in case of failure by our products. The process of money back is very simple: you just need to show us your failure score report within 60 days from the date of purchase of the exam. We will then verify the authenticity of documents submitted and arrange the refund after receiving the email and confirmation process. The money will be back to your payment account within 7 days.

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