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Juniper JN0-351 Exam Overview:

Certification Vendor:Juniper Networks
Exam Name:Enterprise Routing and Switching, Specialist (JNCIS-ENT) Exam
Exam Number:JN0-351
Certificate Validity Period:3 years
Exam Format:Multiple Choice
Exam Price:$200 USD
Related Certifications:JNCIP-ENT
JNCIE-ENT
JNCIA-Junos
Passing Score:Not publicly disclosed (approx. 65%-70%)
Real Exam Qty:65
Available Languages:English
Exam Duration:90 minutes
Recommended Training:Juniper Learning Portal
Exam Registration:Pearson VUE Registration
Sample Questions:Juniper JN0-351 Sample Questions
Exam Way:Online proctored or onsite testing center (Pearson VUE)
Pre Condition:Valid JNCIA-Junos certification
Official Syllabus URL:https://www.juniper.net/us/en/training/certification/tracks/enterprise-routing-switching/jncis-ent.html

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Juniper JN0-351 Exam Syllabus Topics:

TopicDetails
Topic 1
  • BGP: This topic focuses on the operational and conceptual elements of BGP, a cornerstone in enterprise networks.
Topic 2
  • 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 3
  • 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 4
  • 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 5
  • 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 6
  • 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 7
  • 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.

Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) Sample Questions (Q25-Q30):

NEW QUESTION # 25
Which two events cause a router to advertise a connected network to OSPF neighbors? (Choose two.)

Answer: A,D

Explanation:
A is correct because when an OSPF adjacency is established, a router will advertise a connected network to OSPF neighbors. An OSPF adjacency is a logical relationship between two routers that agree to exchange routing information using the OSPF protocol1. To establish an OSPF adjacency, the routers must be in the same area, have compatible parameters, and exchange hello packets1. Once an OSPF adjacency is formed, the routers will exchange database description (DBD) packets, which contain summaries of their link-state databases (LSDBs)1. The LSDBs include information about the connected networks and their costs2. Therefore, when an OSPF adjacency is established, a router will advertise a connected network to OSPF neighbors through DBD packets.
D is correct because when a static route to the 224.0.0.5 address is created, a router will advertise a connected network to OSPF neighbors. The 224.0.0.5 address is the multicast address for all OSPF routers3. A static route to this address can be used to send OSPF hello packets to all OSPF neighbors on a network segment3. This can be useful when the network segment does not support multicast or when the router does not have an IP address on the segment3. When a static route to the 224.0.0.5 address is created, the router will send hello packets to this address and establish OSPF adjacencies with other routers on the segment3. As explained above, once an OSPF adjacency is formed, the router will advertise a connected network to OSPF neighbors through DBD packets.


NEW QUESTION # 26
You want to prevent rogue BPDUs from lab devices reaching the internal through the Lab_Switch device.

Referring to the exhibit, what should be done to accomplish this task?

Answer: A


NEW QUESTION # 27
You are troubleshooting a BGP routing issue between your network and a customer router and are reviewing the BGP routing policies. Which two statements are correct in this scenario?
(Choose two.)

Answer: B,C

Explanation:
In BGP, routing policies are used to control the flow of routing information between BGP peers.
Option C suggests that import policies are applied after the RIB-In table. This is correct because import policies in BGP are applied to routes that are received from a BGP peer, before they are installed in the local BGP Routing Information Base (RIB-In). The RIB-In is a database that stores all the routes that are received from all peers.
Option D suggests that export policies are applied after the RIB-Local table. This is correct because export policies in BGP are applied to routes that are being advertised to a BGP peer, after they have been selected from the local BGP Routing Information Base (RIB-Local). The RIB-Local is a database that stores all the routes that the local router is using.


NEW QUESTION # 28
You are troubleshooting a BGP routing issue between your network and a customer router and are reviewing the BGP routing policies. Which two statements are correct in this scenario? (Choose two.)

Answer: B,C

Explanation:
In BGP, routing policies are used to control the flow of routing information between BGP peers 1 .
Option C suggests that import policies are applied after the RIB-In table. This is correct because import policies in BGP are applied to routes that are received from a BGP peer, before they are installed in the local BGP Routing Information Base (RIB-In) 1 . The RIB-In is a database that stores all the routes that are received from all peers 1 .
Option D suggests that export policies are applied after the RIB-Local table. This is correct because export policies in BGP are applied to routes that are being advertised to a BGP peer, after they have been selected from the local BGP Routing Information Base (RIB-Local) 1 . The RIB-Local is a database that stores all the routes that the local router is using 1 .
Therefore, options C and D are correct.


NEW QUESTION # 29
What is the default hello interval on an OSPF interface?

Answer: C

Explanation:
The default hello interval on an OSPF interface depends on the network type of the interface. For point-to- point and broadcast network types, the default hello interval is 10 seconds. For non-broadcast and point-to- multipoint network types, the default hello interval is 30 seconds. The hello interval is the time between sending hello packets to establish and maintain neighbor adjacencies. The hello interval can be configured manually on each interface using the ip ospf hello-interval command. References:
* OSPF Hello and Dead Interval - NetworkLessons.com
* OSPF Hello and Dead Interval: Operation and Configuration
* Adjusting OSPF Timers - Cisco IOS Cookbook, 2nd Edition
* ospf timer hello - WLAN AC V200R010C00 Command Reference - Huawei
* OSPF Timers - Hello and Dead Intervals - Packet Lab


NEW QUESTION # 30
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