Free JN0-351: Enterprise Routing and Switching, Specialist (JNCIS-ENT) Exam Questions and Answers
Enterprise Routing and Switching, Specialist (JNCIS-ENT) is exam JN0-351, 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.
If you searched for JN0-351 dumps, a JN0-351 ExamTopics discussion or a free JN0-351 PDF, this is the Enterprise Routing and Switching, Specialist (JNCIS-ENT) question bank: practice questions with verified answers and explanations, a timed JN0-351 practice test and updates whenever Juniper changes the exam.
Last updated: October 5, 2026
- Exam code
- JN0-351
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- Juniper
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- 1000+
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- First 10, with answers
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- 130 mins · 70%
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Question #1
You are attempting to configure the initial two aggregated Ethernet interfaces on a router but there are no aggregated Ethernet interfaces available. In this scenario, which configuration will enable these interfaces on this router?
Correct answer: B
Explanation
Aggregated Ethernet interfaces exist only after 'set chassis aggregated-devices ethernet device-count N'. Two ae interfaces require device-count of at least 2; only option B (device-count 10) creates enough. Options C and D create just one, and option A sets no device-count at all.
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Question #2
Exhibit. You want to enable redundancy for the EBGP peering between the two routers shown in the exhibit. Which three actions will you perform in this scenario? (Choose three.)
Select 3 answers.
Correct answer: A, B, C
Explanation
• A is correct because you need to configure BGP multihop to enable redundancy for the EBGP peering between the two routers. BGP multihop is a feature that allows BGP peers to establish a session over multiple hops, instead of requiring them to be directly connected1. By default, EBGP peers use a time-to-live (TTL) value of 1 for their packets, which means that they can only reach adjacent neighbors1. However, if you configure BGP multihop with a higher TTL value, you can allow EBGP peers to communicate over multiple routers in between1. This can provide redundancy in case of a link failure or a router failure between the EBGP peers. • B is correct because you need to configure loopback interface peering to enable redundancy for the EBGP peering between the two routers. Loopback interface peering is a technique that uses loopback interfaces as the source and destination addresses for BGP sessions, instead of physical interfaces2. Loopback interfaces are virtual interfaces that are always up andreachable as long as the router is operational2. By using loopback interface peering, you can avoid the dependency on a single physical interface or link for the BGP session, and use multiple paths to reach the loopback address of the peer2. This can provide redundancy and load balancing for the EBGP peering. • C is correct because you need to configure routes for the peer loopback interface IP addresses to enable redundancy for the EBGP peering between the two routers. Routes for the peer loopback interface IP addresses are necessary to ensure that the routers can reach each other's loopback addresses over multiple hops2. You can use static routes or dynamic routing protocols to advertise and learn the routes for the peer loopback interface IP addresses2. Without these routes, the routers will not be able to establish or maintain the BGP session using their loopback interfaces.
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Question #3
Exhibit. The ISP1.inet.0 route table has currently no routes in it. What will happen when you commit the configuration shown on the exhibit?
Correct answer: B
Explanation
The ISP1 forwarding instance has an instance-import policy (ISP1-import) that accepts routes 'from instance master'. Committing it copies the routes of the master instance table inet.0 into ISP1.inet.0; inet.0 itself is unchanged.
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Question #4
Which two statements about redundant trunk groups on EX Series switches are correct? (Choose two.)
Select 2 answers.
Correct answer: C, D
Explanation
• C is correct because Layer 2 control traffic is permitted on the secondary link of a redundant trunk group (RTG) on EX Series switches. Layer 2 control traffic includes protocols such as LLDP, LACP, and STP, which are used to exchange information and coordinate actions between switches1. According to the Juniper Networks documentation2, Layer 2 control traffic is allowed to pass through both the active and the secondary links of an RTG, but data traffic is only forwarded through the active link. This allows the switches to maintain their Layer 2 adjacencies and monitor the link status on both links. • D is correct because if the active link fails, then the secondary link automatically takes over in an RTG on EX Series switches. An RTG consists of two trunk links: an active or primary link, and a secondary or backup link2. The active link is used to forward data traffic, while the secondary link is in standby mode. If the active link fails or becomes unavailable, the secondary link immediately transitions to a forwarding state and takes over the data traffic without waiting for normal STP convergence2. This provides fast recovery and redundancy for the network.
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Question #5
Exhibit You are a network operator troubleshooting BGP connectivity. Which two statements are correct about the output shown in the exhibit? (Choose two.)
Select 2 answers.
Correct answer: C, D
Explanation
The output shows Local AS 65400, so R1 is in AS 65400, and the NLRI for the session is inet-unicast, so IPv4 unicast routes are exchanged. The session state is Established, and 63645 after the peer address is the TCP port, not the AS (the peer AS is 65401).
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Question #6
Which statement is correct about the IS-IS ISO NET address?
Correct answer: B
Explanation
• An ISO NET address is a type of network address used by the IS-IS routing protocol. It identifies a point of connection to the network, such as a router interface, and is also called a Network Service Access Point (NSAP)1. • An ISO NET address consists of three parts: an area ID, a system ID, and a selector2. The area ID identifies the IS-IS area to which the device belongs. The system ID uniquely identifies the device within the area. The selector identifies a specific service or function on the device, such as routing or management2. • An ISO NET address must be unique for each device in the network, because it is used by IS-IS to establish adjacencies, exchange routing information, and compute shortest paths2. If two devices have the same ISO NET address, they will not be able to communicate with each other or with other devices in the network. Therefore, it is important to assign different ISO NET addresses to each device in the network.
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Question #7
You are receiving multiple BGP routes from an upstream neighbor and only want to advertise a single summarized prefix to your internal OSPF neighbors. This route should only be advertised when you are receiving these BGP routes from this neighbor. In this scenario, which type of route should you create?
Correct answer: A
Explanation
An aggregate route summarizes multiple contributing routes and stays active only while at least one contributing route (the BGP routes) exists, so the summary is advertised into OSPF only when those routes are received. A generated route also needs contributing routes but installs a forwarding next hop.
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Question #8
You want to ensure traffic is routed through a GRE tunnel. In this scenario, which two statements will satisfy this requirement? (Choose two.)
Select 2 answers.
Correct answer: A, B
Explanation
Option A is correct. For traffic to be sent through a GRE tunnel, there must be a route that directs the traffic into the tunnel. This is typically accomplished through the use of a static route or a dynamic routing protocol. Option B is correct. All intermediary devices must have a route to the tunnel endpoints34. In real-world scenarios, the tunnel endpoints for a tunnel going over the Internet must have globally reachable internet addresses. Otherwise, intermediate routers in the Internet cannot forward the tunneled packets.
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Question #9
Which two BGP attributes must be supported by all BGP implementations and must be included in every update? (Choose two.)
Select 2 answers.
Correct answer: A, C
Explanation
BGP attributes are properties that BGP uses for route advertisement, path selection, and loop prevention1. There are four categories of BGP attributes123: • Well-known mandatory: Must be recognized by all BGP routers, present in all BGP updates, and passed on to other BGP routers123. • Well-known discretionary: Supported by all BGP implementations, and are optionally included in BGP updates1. • Optional transitive: May not be supported by all implementations of BGP1. • Optional non-transitive: May not be supported by all implementations of BGP1. The well-known mandatory attributes must be supported by all BGP implementations and must be included in every update123. These include the AS path and next hop attributes23. Therefore, options A and C are correct.
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Question #10
Refer to the exhibit. Referring to the output shown in the exhibit, which statement is correct?
Correct answer: B
Explanation
In OSPF, the state of the neighbor relationship is determined by the exchange of OSPF packets between routers1. The state ??2Way?? as shown in the exhibit indicates that bi-directional communication has been established between the two OSPF routers1. This is the normal state for a neighbor that is not the Designated Router (DR) or Backup Designated Router (BDR) on a broadcast, non-broadcast multi-access (NBMA), or point-to-multipoint network1. These neighbors are often referred to as "DRothers"1. Therefore, option B is correct.
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Discussion
Explain your reasoning, not just the letterOther 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)
- JN0-231: Security, Associate (JNCIA-SEC) (opens in a new tab)
- JN0-347: Enterprise Routing and Switching, Specialist (JNCIS-ENT) (opens in a new tab)
- JN0-634: Security Professional (JNCIP-SEC) (opens in a new tab)
- JN0-1101: Juniper Networks Certified Design Associate (JNCDA) (opens in a new tab)
- JN0-349: Enterprise Routing and Switching, Specialist (JNCIS-ENT) (opens in a new tab)
- JN0-360: Juniper Networks Certified Internet Specialist SP (JNCIS-SP) (opens in a new tab)
- JN0-664: Service Provider Routing and Switching, Professional (JNCIP-SP) (opens in a new tab)
- JN0-682: Data Center, Professional (JNCIP-DC) (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 JN0-351: Enterprise Routing and Switching, Specialist (JNCIS-ENT) exam?
- A: JN0-351: Enterprise Routing and Switching, Specialist (JNCIS-ENT) is a Juniper certification exam. Judging by the questions in our bank, it concentrates on RSTP, is-is, switches, referring and router.
- Q2: What topics does the JN0-351: Enterprise Routing and Switching, Specialist (JNCIS-ENT) exam cover?
- A: Questions in our JN0-351: Enterprise Routing and Switching, Specialist (JNCIS-ENT) bank cluster around RSTP, is-is, switches, referring, router, snooping, series 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 JN0-351: Enterprise Routing and Switching, Specialist (JNCIS-ENT)?
- A: Work through the JN0-351: 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 JN0-351: 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 JN0-351: Enterprise Routing and Switching, Specialist (JNCIS-ENT). Answers are verified and updated weekly.
- Q5: Where do I register for the JN0-351: 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 JN0-351: Enterprise Routing and Switching, Specialist (JNCIS-ENT) sample?
- A: Yes. Every JN0-351: 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.
- Q8: Why should I pursue Juniper Certification?
- 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.
- Q9: What are the benefits of Juniper Certification?
- 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.
- Q10: Who should take Juniper Certification Exams?
- 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.
- Q11: What types of Juniper Certification Exams are available?
- 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.
- Q16: How often do I need to recertify for Juniper Certifications?
- A: Juniper Certifications typically require recertification every three years to ensure that certified professionals stay updated with the latest networking technologies and industry practices.