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  • JN0-351: Enterprise Routing and Switching, Specialist

Juniper JN0-351 Exam Questions

Exam Name: Enterprise Routing and Switching, Specialist
Exam Code: JN0-351
Related Certification(s): Juniper Data Center Certification
Certification Provider: Juniper
Actual Exam Duration: 90 Minutes
Number of JN0-351 practice questions in our database: 65 (updated: Jun. 15, 2025)
Expected JN0-351 Exam Topics, as suggested by Juniper :
  • Topic 1: Layer 2 Switching or VLANs: This topic deepens the understanding of Layer 2 switching operations within the Junos OS, including VLAN concepts and benefits. Experienced networking professionals gain insights into configuration, monitoring, and troubleshooting techniques essential for network segmentation and efficiency.
  • Topic 2: Spanning Tree: Networking professionals explore the principles and advantages of the Spanning Tree Protocol (STP) to ensure loop-free topologies in Layer 2 networks.
  • Topic 3: Layer 2 Security: This topic introduces Layer 2 protection mechanisms and firewall filters to fortify network security. Practical skills in configuring, monitoring, and troubleshooting these features prepare candidates to address exam objectives and real-world challenges effectively.
  • Topic 4: Protocol Independent Routing: An essential domain for understanding routing components outside protocol dependencies, this topic enhances expertise in configuring, monitoring, and troubleshooting critical elements.
  • Topic 5: OSPF: The concepts and operational details of OSPF are explored, providing tools for routing efficiency. Configuration and troubleshooting mastery ensure readiness for both the exam and complex enterprise environments.
  • Topic 6: IS-IS: Aspiring Juniper networking professionals enhance their understanding of IS-IS routing protocols. This topic equips candidates with the knowledge to configure and monitor IS-IS systems, addressing specific exam challenges and practical applications.
  • Topic 7: BGP: This topic focuses on the operational and conceptual elements of BGP, a cornerstone in enterprise networks.
  • Topic 8: Tunnels: The fundamentals of IP tunneling are emphasized, highlighting their requirements and functionalities. Mastery in configuring, monitoring, and troubleshooting tunnels equips professionals to meet the demands of the JN0-351 exam.
  • Topic 9: High Availability: This topic covers the importance and application of high availability within Junos OS environments. Knowledge in configuring and managing these components is critical for ensuring robust and uninterrupted network operations, aligning with exam expectations.
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Hyman

9 days ago
Passed the JNCIS-ENT exam with flying colors! Pass4Success's prep materials were invaluable.
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Carin

2 months ago
Juniper certification in the bag! Pass4Success's questions were nearly identical to the actual exam. Thank you!
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Linn

3 months ago
Aced the Juniper exam thanks to Pass4Success! Their materials were spot on and saved me weeks of study time.
upvoted 0 times
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Leota

4 months ago
JNCIS-ENT exam conquered! Huge thanks to Pass4Success for the accurate practice questions.
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Kristofer

5 months ago
Just became Juniper certified! Pass4Success's exam prep was key to my success in such a short time.
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Irma

5 months ago
I passed the exam, and the practice questions from Pass4Success were very helpful. One question that I found difficult was about VLAN configuration and the differences between access and trunk ports. I had to choose the correct port settings for a given scenario.
upvoted 0 times
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Dorothy

6 months ago
So relieved to have passed the Juniper routing and switching exam. Pass4Success, you guys rock!
upvoted 0 times
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Carma

6 months ago
Excited to share that I passed the exam. Pass4Success practice questions were a great resource. There was a question about High Availability features like VRRP and GRES. I had to identify the correct failover mechanisms, which was a bit confusing.
upvoted 0 times
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Judy

6 months ago
I passed the exam, and the practice questions from Pass4Success were crucial. One challenging question was about Protocol Independent Routing and the use of static routes versus dynamic routing protocols. I had to choose the best scenario for each, which was tough.
upvoted 0 times
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Queen

7 months ago
Passed my Juniper exam today! Pass4Success's practice tests were incredibly similar to the real thing.
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Celeste

7 months ago
Happy to announce that I passed the exam. The Pass4Success practice questions were very helpful. There was a question about configuring GRE tunnels and their use cases. I wasn't entirely sure about the exact configuration commands, but I got through it.
upvoted 0 times
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Nadine

7 months ago
Were there any questions on multicast routing?
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Annice

7 months ago
I passed the exam, and Pass4Success practice questions were a big help. One question that puzzled me was about Layer 2 Security features like DHCP snooping and ARP inspection. I had to choose the correct configuration steps, which was tricky.
upvoted 0 times
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Iesha

8 months ago
JNCIS-ENT certification achieved! Couldn't have done it without Pass4Success. Their questions were a lifesaver.
upvoted 0 times
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Rory

8 months ago
Did they test on any specific Junos OS features?
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Lezlie

8 months ago
Thrilled to share that I passed the exam. The practice questions from Pass4Success were spot on. There was a question about IS-IS network types and their corresponding metrics. I wasn't sure about the exact metric values for Level 1 and Level 2, but I managed to answer it.
upvoted 0 times
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Roxane

8 months ago
Thanks for all the insights! Any final advice for those preparing?
upvoted 0 times
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Layla

8 months ago
I did it! Passed the exam with flying colors. Thanks to Pass4Success, I was well-prepared. One question that caught me off guard was about the different types of Spanning Tree Protocols. I had to identify the differences between RSTP and MSTP, which was challenging.
upvoted 0 times
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Colette

9 months ago
Wow, the Juniper exam was tough but I made it! Pass4Success really came through with relevant study material.
upvoted 0 times
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Maurine

9 months ago
Just passed the exam! The practice questions from Pass4Success were invaluable. There was a tricky question about BGP path selection criteria. I had to choose the correct order of attributes like weight, local preference, and AS-path. I wasn't entirely confident, but I still passed.
upvoted 0 times
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Queenie

9 months ago
How about WAN technologies? Any specific areas to focus on?
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Crista

9 months ago
My pleasure! Final advice: practice hands-on configs, understand troubleshooting methods, and use Pass4Success for targeted prep. You've got this!
upvoted 0 times
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Keneth

9 months ago
I recently passed the Juniper Enterprise Routing and Switching, Specialist exam, and I must say, the Pass4Success practice questions were a great help. One question that stumped me was about configuring OSPF areas and their types. I wasn't sure about the difference between a stub area and a totally stubby area, but I managed to get through it.
upvoted 0 times
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Herminia

10 months ago
Just passed the Juniper JNCIS-ENT exam! Thanks Pass4Success for the spot-on practice questions. Saved me so much time!
upvoted 0 times
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Glory

10 months ago
Passing the Juniper Enterprise Routing and Switching, Specialist exam was a great achievement for me, thanks to the help of Pass4Success practice questions. The VLANs and STP topics were key for the exam, and I was able to describe their concepts and functionalities. One question that I recall from the exam was about the configuration steps for setting up VLANs in a network. I had some uncertainties about the process, but I still passed the exam.
upvoted 0 times
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Terrilyn

11 months ago
My exam experience was successful as I passed the Juniper Enterprise Routing and Switching, Specialist exam. The RSTP concepts were essential for the exam, and I was able to identify the benefits and applications of this protocol. One question that I remember from the exam was about the functionalities of RSTP and how it differs from STP. I had some doubts about the specifics, but I still managed to pass the exam.
upvoted 0 times
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Lazaro

11 months ago
Passed the Juniper exam with flying colors! Pass4Success's practice tests were a game-changer. Compressed my study time significantly.
upvoted 0 times
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Fernanda

12 months ago
Successfully cleared JNCIS-ENT! Pass4Success provided amazingly accurate exam questions. Shortened my prep time immensely. Many thanks!
upvoted 0 times
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Pamella

12 months ago
I passed the Juniper Enterprise Routing and Switching, Specialist exam with the help of Pass4Success practice questions. The VLANs and STP concepts were crucial for the exam, and I was able to demonstrate my knowledge in configuring and monitoring them. One question that stood out to me was related to the benefits of using VLANs in a network environment. I was a bit unsure of the answer, but I managed to pass the exam.
upvoted 0 times
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Blondell

1 years ago
JNCIS-ENT certified! Pass4Success's exam questions were incredibly relevant. Couldn't have done it without their help. Thank you!
upvoted 0 times
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Helaine

1 years ago
Security features were a significant part of the exam. Expect questions on firewall filters and policers. Study the difference between input and output filters, and understand how to apply them to interfaces. Pass4Success's exam dumps really helped me reinforce these concepts, allowing me to pass the exam with confidence!
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Kattie

1 years ago
Aced the Juniper Enterprise Routing and Switching exam today. Pass4Success's materials were crucial for my quick preparation. Grateful!
upvoted 0 times
...

Brynn

1 years ago
Just passed the JNCIS-ENT exam! Pass4Success's practice questions were spot-on and saved me weeks of prep time. Thanks!
upvoted 0 times
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Free Juniper JN0-351 Exam Actual Questions

Note: Premium Questions for JN0-351 were last updated On Jun. 15, 2025 (see below)

Question #1

Which two statements are correct about tunnels? (Choose two.)

Reveal Solution Hide Solution
Correct Answer: B, D

A tunnel is a connection between two computer networks, in which data is sent from one network to another through an encrypted link. Tunnels are commonly used to secure data communications between two networks or to connect two networks that use different protocols.

Option B is correct, because tunnel endpoints must have a valid route to the remote tunnel endpoint. A tunnel endpoint is the device that initiates or terminates a tunnel connection. For a tunnel to be established, both endpoints must be able to reach each other over the underlying network.This means that they must have a valid route to the IP address of the remote endpoint1.

Option D is correct, because tunnels add additional overhead to packet size. Tunnels work by encapsulating packets: wrapping packets inside of other packets. This means that the original packet becomes the payload of the surrounding packet, and the surrounding packet has its own header and trailer. The header and trailer of the surrounding packet add extra bytes to the packet size, which is called overhead.Overhead can reduce the efficiency and performance of a network, as it consumes more bandwidth and processing power2.

Option A is incorrect, because BFD can be used to monitor tunnels. BFD is a protocol that can be used to quickly detect failures in the forwarding path between two adjacent routers or switches. BFD can be integrated with various routing protocols and link aggregation protocols to provide faster convergence and fault recovery. BFD can also be used to monitor the connectivity of tunnels, such as GRE, IPsec, or MPLS.

Option C is incorrect, because IP-IP tunnels are stateless. IP-IP tunnels are a type of tunnels that use IP as both the encapsulating and encapsulated protocol. IP-IP tunnels are simple and easy to configure, but they do not provide any security or authentication features. IP-IP tunnels are stateless, which means that they do not keep track of the state or status of the tunnel connection. Stateless tunnels do not require any signaling or negotiation between the endpoints, but they also do not provide any error detection or recovery mechanisms.


1:What is Tunneling? | Tunneling in Networking2:What Is Tunnel In Networking, Its Types, And Its Benefits?: [Configuring Bidirectional Forwarding Detection] : [IP-IP Tunneling]

Question #2

Exhibit.

Which router will become the OSPF BDR if all routers are powered on at the same time?

Reveal Solution Hide Solution
Correct Answer: A

OSPF DR/BDR election is a process that occurs on multi-access data links. It is intended to select two OSPF nodes: one to be acting as the Designated Router (DR), and another to be acting as the Backup Designated Router (BDR). The DR and BDR are responsible for generating network LSAs for the multi-access network and synchronizing the LSDB with other routers on the same network1.

The DR/BDR election is based on two criteria: the OSPF priority and the router ID. The OSPF priority is a value between 0 and 255 that can be configured on each interface participating in OSPF. The default priority is 1. A priority of 0 means that the router will not participate in the election and will never become a DR or BDR. The router with the highest priority will become the DR, and the router with the second highest priority will become the BDR. If there is a tie in priority, then the router ID is used as a tie-breaker. The router ID is a 32-bit number that uniquely identifies each router in an OSPF domain. It can be manually configured or automatically derived from the highest IP address on a loopback interface or any active interface2.

In this scenario, all routers have the same priority of 1, so the router ID will determine the outcome of the election. The router IDs are shown in the exhibit as RID values. The highest RID belongs to R4 (10.10.10.4), so R4 will become the DR. The second highest RID belongs to R3 (10.10.10.3), so R3 will become the BDR.


1: OSPF DR/BDR Election: Process, Configuration, and Tuning 2: OSPF Designated Router (DR) and Backup Designated Router (BDR)

Question #4

Exhibit

You are a network operator troubleshooting BGP connectivity.

Which two statements are correct about the output shown in the exhibit? (Choose two.)

Reveal Solution Hide Solution
Correct Answer: B, C

Option B suggests that the BGP session is not established. This is correct because in the output, the state of the BGP session is shown as ''Idle''.In BGP, an ''Idle'' state means that the BGP session is not currently established1.

Option C suggests that R1 is configured for AS 65400.This is also correct because in the output, it's shown that the local AS number is 654001.The local AS number represents the Autonomous System (AS) number of the router on which you're checking the BGP session1.


Question #5

What are two characteristics of RSTP alternate ports? (Choose two.)

Reveal Solution Hide Solution
Correct Answer: A, C

Ais correct because RSTP alternate ports block traffic while receiving superior BPDUs from a neighboring switch.An alternate port is a backup port for a root port, which means it receives better BPDUs from another bridge than the current root port1.However, an alternate port does not forward any traffic, as it is in a discarding state2. It only listens to BPDUs and waits for the root port to fail.If the root port fails, the alternate port can immediately transition to a forwarding state and become the new root port1.

Cis correct because RSTP alternate ports provide an alternate higher cost path to the root bridge.An alternate port is selected based on the same criteria as the root port, which are the lowest bridge ID, the lowest path cost, the lowest sender port ID, and the lowest receiver port ID3.However, an alternate port receives a higher cost BPDU than the root port, otherwise it would be the root port itself1. Therefore, an alternate port provides an alternate higher cost path to the root bridge than the root port.


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