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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: Mar. 24, 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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Linn

8 days ago
Aced the Juniper exam thanks to Pass4Success! Their materials were spot on and saved me weeks of study time.
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Leota

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

2 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

2 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

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

3 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

4 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

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

4 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

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

5 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

5 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

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

5 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

6 months ago
Thanks for all the insights! Any final advice for those preparing?
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Layla

6 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

6 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

6 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.
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Queenie

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

7 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

7 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

7 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

7 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

8 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

9 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

9 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

9 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

9 months 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

9 months 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

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

10 months 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 Mar. 24, 2025 (see below)

Question #1

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 #2

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

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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.


Question #3

Which two statements about redundant trunk groups on EX Series switches are correct? (Choose two.)

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Correct Answer: C, D

Cis 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.

Dis 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.


Question #4

You are an operator for a network running 1S-IS. Two routers are failing to form an adjacency. What are two reasons for this problem? (Choose two.)

Reveal Solution Hide Solution
Correct Answer: B, D

The two reasons for the failure to form an adjacency in a network running IS-IS could be:

B) There is no configured ISO address on any IS-IS interface.IS-IS requires each router interface to have an ISO address configured.Without this address, the routers cannot form an adjacency1.

D) The family iso configuration is missing from the adjacency interface.The 'family iso' configuration is essential for IS-IS to function correctly.If this configuration is missing from the adjacency interface, it could prevent the formation of an adjacency1.

These explanations are based on the Enterprise Routing and Switching Specialist (JNCIS-ENT) documents and learning resources available at Juniper Networks23.


Question #5

Which statement is correct about the storm control feature?

Reveal Solution Hide Solution
Correct Answer: A

Option A is correct.The storm control feature is enabled in the factory-default configuration on EX Series switches12.On EX2200, EX3200, EX3300, EX4200, and EX6200 switches, the factory default configuration enables storm control for broadcast and unknown unicast traffic on all switch interfaces2.On EX4300 switches, the factory default configuration enables storm control on all Layer 2 switch interfaces1.

Option B is incorrect.The storm control feature does not require a special license on EX Series switches34.

Option C is incorrect. There's no information available that suggests the storm control feature is not supported on aggregate Ethernet interfaces.

Option D is incorrect.The storm control configuration applies to traffic at the ingress of an interface5, not just between the forwarding and control plane.


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