Detail JN0-351 Explanation | Exam JN0-351 Topics

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Juniper JN0-351 Exam Overview:

Certification Vendor:	Juniper Networks
Exam Name:	Enterprise Routing and Switching, Specialist (JNCIS-ENT)
Exam Number:	JN0-351
Real Exam Qty:	65
Related Certifications:	JNCIS-ENT
Exam Duration:	90 minutes
Exam Price:	$300 USD
Available Languages:	English
Exam Format:	Multiple-choice questions
Passing Score:	Not specified (Pass/Fail status available immediately)
Certificate Validity Period:	3 years
Sample Questions:	Juniper JN0-351 Sample Questions
Exam Way:	Pearson VUE testing centers (In-person)
Pre Condition:	Recommended: 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:

Topic	Details
Topic 1	BGP: This topic focuses on the operational and conceptual elements of BGP, a cornerstone in enterprise networks.
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	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 4	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 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	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 7	Protocol Independent Routing: An essential domain for understanding routing components outside protocol dependencies, this topic enhances expertise in configuring, monitoring, and troubleshooting critical elements.

Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) Sample Questions (Q142-Q147):

NEW QUESTION # 142
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?

A. static route using the resolve feature
B. aggregate route
C. generate route
D. static route using qualified next hops

Answer: C

Explanation:
Both aggregate and generated routes would work, but the best choice is generated routes.
One key difference:
With aggregated routes any prefix in the routing table counts as a contributing route.
With generated routes only prefix with a valid next-hop qualifies.

NEW QUESTION # 143
Which two statements are correct about the Junos OS "commit confirmed" command? (Choose two.)

A. It automatically rolls back the configuration if a subsequent confirming commit is not issued within a specified time.
B. It disables the ability to roll back the configuration entirely.
C. It permanently commits the configuration with no rollback option.
D. It is useful for testing configuration changes that could affect remote connectivity.

Answer: A,D

Explanation:
The "commit confirmed" command in Junos OS commits a configuration change but automatically schedules a rollback to the previous configuration if a follow-up "commit" (confirming commit) is not issued within the specified timeframe (default 10 minutes). This is particularly useful when making changes that could disrupt remote management access, providing a safety net against being locked out.

NEW QUESTION # 144
You are deploying an EX Series switch with a Wi-Fi access point. The access point needs all untagged traffic to use a specific VLAN. In this scenario, which feature should you enable on the switch port?

A. flexible VLAN tagging
B. native VLAN
C. VLAN tagging
D. voice VLAN

Answer: B

NEW QUESTION # 145
What are three well-known mandatory BGP attributes? (Choose three.)

A. AS path
B. next hop
C. local preference
D. origin
E. community

Answer: A,B,D

NEW QUESTION # 146
Which two statements are correct about generated routes? (Choose two.)

A. Generated routes require a contributing route.
B. Generated routes cannot be redistributed into dynamic routing protocols.
C. Generated routes show a next hop in the routing table.
D. Generated routes appear in the routing table as static routes

Answer: A,C

Explanation:
A is correct because generated routes require a contributing route. A contributing route is a route that matches the destination prefix of the generated route and has a valid next hop1. A generated route is only installed in the routing table if there is at least one contributing route available2. This ensures that the generated route is reachable and useful. If there is no contributing route, the generated route is not added to the routing table2.
B is correct because generated routes show a next hop in the routing table. A generated route inherits the next hop of its primary contributing route, which is the most preferred route among all the contributing routes2. The next hop of the generated route can be either an IP address or an interface name, depending on the type of the contributing route2. The next hop of the generated route can also be modified by a routing policy3.

NEW QUESTION # 147
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