JN0-351 Prüfungsunterlagen & JN0-351 Zertifizierung

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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
Certificate Validity Period:	3 years
Passing Score:	Not specified (Pass/Fail status available immediately)
Related Certifications:	JNCIS-ENT
Exam Format:	Multiple-choice questions
Exam Duration:	90 minutes
Exam Price:	$300 USD
Available Languages:	English
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 Prüfungsplan:

Thema	Einzelheiten
Thema 1	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.
Thema 2	BGP: This topic focuses on the operational and conceptual elements of BGP, a cornerstone in enterprise networks.
Thema 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.
Thema 4	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.
Thema 5	Spanning Tree: Networking professionals explore the principles and advantages of the Spanning Tree Protocol (STP) to ensure loop-free topologies in Layer 2 networks.
Thema 6	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.
Thema 7	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.
Thema 8	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) JN0-351 Prüfungsfragen mit Lösungen (Q71-Q76):

71. Frage
Referring to the exhibit, which two configuration changes must you apply for packets to reach from R1 to R3 using IS-IS? (Choose two.)

A. On R1, enable Level 1 on the ge-0/0/1 interface.
B. On R3 disable Level 2 on the ge-0/0/4 interface.
C. On R1, disable Level 2 on the ge-0/0/1 interface.
D. On R3 enable Level 1 on the ge-0/0/4 interface

Antwort: A,D

Begründung:
A) On R1, enable Level 1 on the ge-0/0/1 interface. In IS-IS, both levels (Level 1 and Level 2) are enabled by default when you enable IS-IS on an interface1. Level 1 systems route within an area.
If the destination is outside an area, Level 1 systems route toward a Level 2 system. Therefore, enabling Level 1 on the ge-0/0/1 interface on R1 would allow packets to reach from R1 to R3.
D) On R3 enable Level 1 on the ge-0/0/4 interface Similarly, enabling Level 1 on the ge-0/0/4 interface on R3 would allow packets to reach from R1 to R3. These explanations are based on the IS-IS configuration documents and learning resources available at Juniper Networks1 and Cisco.

72. Frage
Your GRE tunnel is not transitioning to the Up status.
What would be the first step in troubleshooting the problem?

A. Verify that the status of the management interface is up.
B. Verify the status of the management routing instance.
C. Verify tunnel endpoint reachability.
D. Verify that the routing instance for GRE tunnels is created.

Antwort: C

73. Frage
Which statement is correct regarding Junos OS unicast reverse path forwarding (RPF) checks?

A. RPF checks require BGP to function.
B. RPF checks are only used for multicast traffic.
C. RPF checks are used to prevent IP address spoofing by verifying that a packet arrives on the interface that would be used to route back to the source.
D. RPF checks are applied only to outbound traffic.

Antwort: C

Begründung:
Unicast Reverse Path Forwarding (RPF) is a security mechanism that verifies whether a received packet's source address is reachable through the interface on which it arrived, based on the routing table. If the check fails, indicating a potentially spoofed source address, the packet can be discarded, helping to prevent IP spoofing-based attacks.

74. Frage
Referring to the exhibit, why is this OSPF adjacency remaining in this state?

A. A hello interval mismatch exists between the OSPF neighbors.
B. An area ID mismatch exists between the OSPF neighbors
C. A subnet mask mismatch exists between the OSPF neighbors.
D. An MTU mismatch exists between the OSPF neighbors.

Antwort: D

Begründung:
OSPF stuck in ExStart is mainly related to mismatched MTU. It could also be caused by a firewall filter on the loopback interface, but this is not an alternative.

75. Frage
You are asked to explore deploying IS-IS in your network. What are two considerations in this scenario?
(Choose two)

A. TLVs are not required to support IPv6 reachability.
B. TLVs are required to support IPv4 reachability.
C. TLVs are not required to support IPv4 reachability.
D. TLVs are required to support IPv6 reachability.

Antwort: B,D

76. Frage
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