Free JN0-349: Enterprise Routing and Switching, Specialist (JNCIS-ENT) Exam Questions and Answers
Enterprise Routing and Switching, Specialist (JNCIS-ENT) is exam JN0-349, part of the Juniper Networks Certification Program. Juniper's written exams share one format across every track and level: 65 multiple-choice questions in 90 minutes, delivered by Pearson VUE. The JN0- code carries the track in its second digit — 3 is security, 4 enterprise routing and switching, 5 Mist AI, 6 service provider, 8 data centre — and the level in the first, running Associate, Specialist, Professional and Expert.
The first 10 questions on this page are free to read, answers included — no account and no card. A plan opens the rest of the bank, the full timed practice test and your weak-topic reporting.
Last updated: September 19, 2026
- Exam code
- JN0-349
- Provider
- Juniper
- Questions in our bank
- 1000+
- Free to read
- First 10, with answers
- Official page
- Official Exam website
- Our test mode duration & pass mark
- 130 mins · 70%
Recommended: Switch to Test Mode to start a practice test that simulates the real exam experience.
Question #1
Click the Exhibit button. You are trying to form an IS-IS adjacency between Router A and Router B, but the IS-IS adjacency will not form between the two routers. Referring to the exhibit, which action would solve this problem?
Please select an optionIncorrectCorrect answer: C
Was this answer correct?Question #2
Which two statements about Layer 2 firewall filters are correct? (Choose two.)
Select 2 answers.
Please select an optionIncorrectCorrect answer: B, C
A Layer 2 firewall filter can contain multiple terms, but only one input filter can be applied to a VLAN.
Was this answer correct?Question #3
Click the Exhibit button. Referring to the exhibit, which statement is correct?
Please select an optionIncorrectCorrect answer: D
The Root ID is 8192.50:c5:8d:ae:db:41, so the root bridge priority is 8k. The local Bridge ID is 32768..., so the local priority is 32k and this device is not the root.
Was this answer correct?Question #4
Which mechanism is used to share routes between routing tables?
Please select an optionIncorrectCorrect answer: A
RIB groups import or copy routes from one routing table into another, which is how routes are shared between routing tables.
Was this answer correct?Question #5
Click the Exhibit button. You are responsible for managing a Layer 2 network using RSTP for loop prevention. You recently committed the configurations shown in the exhibit. Unfortunately, Switch-2 became the root bridge and you must ensure that Switch-1 becomes the root bridge, when available, for this RSTP topology. Referring to the exhibit, which configuration change should be performed?
Please select an optionIncorrectCorrect answer: C
All three switches use the default bridge-priority of 32k, so the root was chosen by lowest MAC address. Lowering Switch-1's bridge-priority to 4k makes it the root bridge whenever it is available; interface cost and port priority do not influence root election.
Was this answer correct?Question #6
Click the Exhibit button. Referring to the exhibit, which statement is correct?
Please select an optionIncorrectCorrect answer: B
R1 (priority 255) is the DR and R2 (254) is the BDR; R3 and R4 are DROthers and stay in 2Way with each other. Every router in the area, including R3, synchronizes with the DR and holds the complete OSPF database.
Was this answer correct?Question #7
You were provided a network diagram that told you to number your network from the 191.255.0.0/16 space. OSPF is enabled and adjacencies are up, but no routers are learning any routes. What can explain this?
Please select an optionIncorrectCorrect answer: C
Junos lists 191.255.0.0/16 as a martian address, so OSPF routes in that space are rejected until the martian table is modified to accept the prefix.
Was this answer correct?Question #8
What are three reasons a router would send out an IS-IS link-state PDU? (Choose three.)
Select 3 answers.
Please select an optionIncorrectCorrect answer: B, C, D
An IS-IS router sends a new link-state PDU when a neighbor link goes down, when a new neighbor is discovered, and when a link metric to an existing neighbor changes. LSPs are not sent at random intervals.
Was this answer correct?Question #9
If an EX Series switch receives a frame with a known destination MAC address, what is the expected behavior?
Please select an optionIncorrectCorrect answer: D
A frame with a known unicast destination MAC address is forwarded only out the port learned for that MAC in the bridge table of the ingress VLAN.
Was this answer correct?Question #10
Referring to the exhibit, which devices will receive the packet sent by User B?
Please select an optionIncorrectCorrect answer: B
The hub repeats User B's frame to User C and to the switch. The switch has the destination MAC 00:26:88:02:74:89 in its bridge table on ge-0/0/9, so it forwards only to User D.
Was this answer correct?
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Other Juniper certifications
- JN0-104: Junos, Associate (JNCIA-Junos) (opens in a new tab)
- JN0-105: Junos, Associate (JNCIA-Junos) (opens in a new tab)
- JN0-363: Service Provider Routing and Switching, Specialist (JNCIS-SP) (opens in a new tab)
- JN0-230: Security, Associate (JNCIA-SEC) (opens in a new tab)
- JN0-351: Enterprise Routing and Switching, Specialist (JNCIS-ENT) (opens in a new tab)
- JN0-231: Security, Associate (JNCIA-SEC) (opens in a new tab)
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FAQ
Learn More: https://www.juniper.net/us/en/training/certification.html
- Q1: What is the JN0-349: Enterprise Routing and Switching, Specialist (JNCIS-ENT) exam?
- A: JN0-349: Enterprise Routing and Switching, Specialist (JNCIS-ENT) is a Juniper certification exam. Judging by the questions in our bank, it concentrates on is-is, OSPF, router, routing and juniper.
- Q2: What topics does the JN0-349: Enterprise Routing and Switching, Specialist (JNCIS-ENT) exam cover?
- A: Questions in our JN0-349: Enterprise Routing and Switching, Specialist (JNCIS-ENT) bank cluster around is-is, OSPF, router, routing, juniper, routes, referring and routers. Working through the full set is the quickest way to find which of these you are weakest on.
- Q3: How should I prepare for JN0-349: Enterprise Routing and Switching, Specialist (JNCIS-ENT)?
- A: Work through the JN0-349: Enterprise Routing and Switching, Specialist (JNCIS-ENT) practice questions here, checking your answer on each one, then sit the practice test to rehearse the exam under timed conditions before the real thing.
- Q4: Are these real JN0-349: Enterprise Routing and Switching, Specialist (JNCIS-ENT) exam questions?
- A: They are drawn from officially released past questions and from community members who have sat JN0-349: Enterprise Routing and Switching, Specialist (JNCIS-ENT). Answers are verified and updated weekly.
- Q5: Where do I register for the JN0-349: Enterprise Routing and Switching, Specialist (JNCIS-ENT) exam?
- A: Register through Juniper directly at https://www.juniper.net/us/en/training/certification.html. Exampractice is not affiliated with Juniper and does not administer the exam.
- Q6: Is there a free JN0-349: Enterprise Routing and Switching, Specialist (JNCIS-ENT) sample?
- A: Yes. Every JN0-349: Enterprise Routing and Switching, Specialist (JNCIS-ENT) page shows a free sample of real questions. Upgrading opens the full bank and the practice test.
- Q7: What are Juniper Certification Exams?
- A: Juniper Certification Exams validate your expertise in using and managing Juniper Networks’ products and solutions, including routing, switching, security, and automation. These certifications demonstrate your proficiency in deploying, configuring, and troubleshooting Juniper technologies to optimize network performance and security.
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- A: Juniper Certification enhances your professional credibility, showcasing your skills and knowledge in networking and security. This can lead to better job opportunities, higher salaries, and career advancement in IT, networking, and cybersecurity roles.
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- A: Benefits include recognition as a certified Juniper professional, improved job performance, access to exclusive resources, continuing education opportunities, and staying current with the latest Juniper technologies and best practices.
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- A: Network engineers, system administrators, security professionals, and anyone involved in managing and implementing Juniper Networks’ solutions should consider these certifications to validate their expertise and advance their careers.
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- A: Juniper offers various certification paths, including:
- Q12: How do I prepare for Juniper Certification Exams?
- A: Preparation can include official Juniper training courses, study guides, practice exams, online tutorials, and hands-on experience with Juniper products and solutions.
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- A: Juniper Certification Exams can be taken at authorized Pearson VUE testing centers worldwide or online, providing flexibility to fit your schedule and location.
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- A: Juniper Certifications significantly boost your career by demonstrating your expertise to employers, making you a more competitive candidate for advanced roles and promotions in networking, security, and IT infrastructure.
- Q15: Are there any prerequisites for Juniper Certification Exams?
- A: Some exams may have prerequisites, such as foundational knowledge or prior experience with Juniper products. Check the specific requirements for each certification path on the Juniper Networks Certification Program (JNCP) website.
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- A: Juniper Certifications typically require recertification every three years to ensure that certified professionals stay updated with the latest networking technologies and industry practices.