JN0-351 Exam Guide & JN0-351 Accurate Answers & JN0-351 Torrent Cram

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Juniper JN0-351 Exam Syllabus Topics:

Topic	Details
Topic 1	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 2	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 3	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 4	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 5	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 6	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 7	BGP: This topic focuses on the operational and conceptual elements of BGP, a cornerstone in enterprise networks.
Topic 8	Spanning Tree: Networking professionals explore the principles and advantages of the Spanning Tree Protocol (STP) to ensure loop-free topologies in Layer 2 networks.

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Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) Sample Questions (Q45-Q50):

NEW QUESTION # 45
Which two statements are correct about Q-in-Q tunneling on Juniper EX Series switches?
(Choose two.)

A. Q-in-Q removes the customer VLAN tag entirely before forwarding.
B. Q-in-Q is used to extend Layer 2 VLANs transparently across a service provider network.
C. Q-in-Q can only be used with untagged traffic.
D. Q-in-Q adds an additional 802.1Q VLAN tag to already-tagged customer traffic.

Answer: B,D

Explanation:
Q-in-Q (IEEE 802.1ad-style tunneling) works by adding a second, outer 802.1Q VLAN tag to already VLAN-tagged customer traffic, allowing a service provider to transparently transport multiple customer VLANs across their network using a single outer VLAN tag per customer, without needing visibility into or interference with the customer's inner VLAN tags.

NEW QUESTION # 46
You want to ensure traffic is routed through a GRE tunnel.
In this scenario, which two statements will satisfy this requirement? (Choose two.)

A. Tunnel endpoints must have a route that directs traffic into the tunnel.
B. All intermediary devices must have a route to the tunnel endpoints.
C. Keepalives must be used on stateless tunneling protocols.
D. BFD must be used on the stateless tunneling protocols.

Answer: A,B

Explanation:
Explanation
Option A is correct. For traffic to be sent through a GRE tunnel, there must be a route that directs the traffic into the tunnel. This is typically accomplished through the use of a static route or a dynamic routing protocol.
Option B is correct. All intermediary devices must have a route to the tunnel endpoints34. In real-world scenarios, the tunnel endpoints for a tunnel going over the Internet must have globally reachable internet addresses. Otherwise, intermediate routers in the Internet cannot forward the tunneled packets.

NEW QUESTION # 47
When electing a DIS in an IS-IS network, what is used to break a priority tie?

A. highest router ID
B. lowest MAC address
C. lowest router ID
D. highest MAC address

Answer: D

NEW QUESTION # 48
A new network requires multiple topology support. You decide to use IS-IS in this situation. Which three protocol topologies are supported in this scenario? (Choose three.)

A. IPv6
B. IPv4
C. anycast
D. IPsec
E. multicast

Answer: A,B,E

Explanation:
IS-IS (Intermediate System to Intermediate System) is a routing protocol that is designed to move information efficiently within a computer network 1 2 . It supports multiple protocol topologies, including IPv4, IPv6, and multicast 1 2 . Therefore, options C, E, and D are correct.

NEW QUESTION # 49
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.)

A. There is a mismatched area ID between the L2 routers.
B. There are mismatched router IDs on the L2 routers.
C. The family iso configuration is missing from the adjacency interface.
D. There is no configured ISO address on any IS-IS interface.

Answer: C,D

Explanation:
Explanation
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.

NEW QUESTION # 50
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