JN0-351 Latest Braindumps Files & Exam JN0-351 Questions Fee

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The Enterprise Routing and Switching, Specialist (JNCIS-ENT) (JN0-351) practice exam consists of a Enterprise Routing and Switching, Specialist (JNCIS-ENT) (JN0-351) PDF dumps format, Desktop-based JN0-351 practice test software and a Web-based Enterprise Routing and Switching, Specialist (JNCIS-ENT) (JN0-351) practice exam. Each of the Pass4SureQuiz Juniper JN0-351 Exam Dumps formats excels in its way and carries actual Enterprise Routing and Switching, Specialist (JNCIS-ENT) (JN0-351) exam questions for optimal preparation.

Juniper JN0-351 Exam Syllabus Topics:

Topic	Details
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	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	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 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	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.
Topic 7	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 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.

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Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) Sample Questions (Q35-Q40):

NEW QUESTION # 35
Which two statements about BGP facilitate the prevention of routing loops within an autonomous system?
(Choose two.)

A. Routes learned from IBGP neighbors are only advertised to other IBGP neighbors.
B. Routes learned from IBGP neighbors are not readvertised to other IBGP neighbors.
C. IBGP sessions must be configured as a logical full mesh.
D. IBGP sessions must be configured as a physical full mesh.

Answer: B,C

Explanation:
BGP has a simple loop prevention mechanism for eBGP that checks the AS path for its own AS number.
However, this mechanism does not work for iBGP, since all routers in the same AS have the same AS number. Therefore, iBGP has two additional rules to prevent routing loops within an autonomous system:
A router does not advertise a route learned from an iBGP neighbor to another iBGP neighbor. This rule ensures that a route does not loop back to the original iBGP router through another iBGP path.
A router does not accept a route learned from an iBGP neighbor if the next hop is not reachable via an IGP.
This rule ensures that a router does not forward packets to an unreachable next hop.
These two rules imply that iBGP sessions must be configured as a logical full mesh, meaning that every iBGP router must have a direct iBGP session with every other iBGP router in the same AS. This way, every iBGP router can learn the best route from the eBGP routers and use the IGP to reach the next hop. A logical full mesh does not require a physical full mesh, meaning that iBGP routers do not have to be directly connected.
They can use intermediate routers to establish iBGP sessions, as long as the IGP can reach the next hop.
A logical full mesh can be challenging to scale and maintain, especially for large ASes with many iBGP routers. Therefore, some alternatives to the full mesh requirement have been developed, such as route reflectors and confederations. These alternatives relax the iBGP rules and introduce additional attributes and mechanisms to prevent routing loops, such as originator ID and cluster list. References:
BGP Fundamentals
BGP - eBGP loop prevention mechanism same AS number
Loop Prevention in BGP Routing

NEW QUESTION # 36
What is the default keepalive time for BGP?

A. 10 seconds
B. 90 seconds
C. 60 seconds
D. 30 seconds

Answer: D

Explanation:
The default hold-time is 90 seconds, meaning that the default frequency for keepalive messages is 30 seconds.
https://www.juniper.net/documentation/us/en/software/junos/bgp/topics/ref/statement/precision- timers-edit-protocols- bgp.html#:~:text=BGP%20on%20the%20local%20routing,keepalive%20messages%20is%2030
%20seconds

NEW QUESTION # 37
What are two reasons for creating multiple areas in OSPF? (Choose two.)

A. to increase the number of adjacencies in the backbone
B. to reduce LSA flooding across the network
C. to reduce the convergence time
D. to increase the size of the LSDB

Answer: B,C

Explanation:
Explanation
Option A is correct. Creating multiple areas in OSPF can help to reduce the convergence time . This is because changes in one area do not affect other areas, so fewer routers need to run the SPF algorithm in response to a change.
Option D is correct. Creating multiple areas in OSPF can help to reduce Link State Advertisement (LSA) flooding across the network. This is because LSAs are not flooded out of their area of origin.

NEW QUESTION # 38
You have two OSPF routers that will not form an adjacency. You enter the show log trace- ospfcommand.
Referring to the exhibit, which statement is correct?

A. There is a mismatched subnet.
B. You are stuck in the ExStart state.
C. The physical connection has been disconnected.
D. The wrong OSPF area has been configured.

Answer: D

NEW QUESTION # 39
Which statement is correct about controlling the routes installed by a RIB group?

A. An import policy is applied to the RIB group.
B. Only routes in the last table are installed.
C. An export policy is applied to the RIB group.
D. A firewall filter must be configured to install routes in the RIB groups.

Answer: A

Explanation:
Explanation
A RIB group is a configuration that allows a routing protocol to install routes into multiple routing tables in Junos OS. A RIB group consists of an import-rib statement,which specifies the source routing table, and an export-rib statement, which specifies the destination routing table or group. A RIB group can also include an import-policy statement, which specifies one or more policies to control which routes are imported into the destination routing table or group1.
An import policy is a policy statement that defines the criteria for accepting or rejecting routes from the source routing table. An import policy can also modify the attributes of the imported routes, such as preference, metric, or community. An import policy can be applied to a RIB group by using the import-policy statement under the [edit routing-options rib-groups] hierarchy level1.
Therefore, option A is correct, because an import policy is applied to the RIB group to control which routes are installed in the destination routing table or group. Option B is incorrect, because all routes in the source routing table are imported into the destination routing table or group, unless filtered by an import policy.
Option C is incorrect, because a firewall filter is not used to install routes in the RIB groups; a firewall filter is used to filter packets based on various criteria. Option D is incorrect, because an export policy is not applied to the RIB group; an export policy is applied to a routing protocol to control which routes are advertised to other devices.
References:
1: rib-groups | Junos OS | Juniper Networks

NEW QUESTION # 40
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