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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
  • 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
  • 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 4
  • 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 5
  • 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 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
  • 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 8
  • 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.

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Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) Sample Questions (Q87-Q92):

NEW QUESTION # 87
Which two statements correctly describe RSTP port roles? (Choose two.)

Answer: B,D

Explanation:
Explanation
In Rapid Spanning Tree Protocol (RSTP), there are several port roles that determine the behavior of the port in the spanning tree1.
Option A suggests that the designated port forwards data to the downstream network segment or device. This is correct because the designated port is the port on a network segment that has the best path to the root bridge1. It's responsible for forwarding frames towards the root bridge and sending configuration messages into its segment1.
Option D suggests that the root port is responsible for forwarding data to the root bridge. This is also correct because the root port is always the link directly connected to the root bridge, or the shortest path to the root bridge1. It's used to forward traffic towards the root bridge1.
Therefore, options A and D are correct.


NEW QUESTION # 88
Exhibit:

Which statement is correct about the configuration shown in the exhibit?

Answer: A


NEW QUESTION # 89
Which two BGP attributes must be supported by all BGP implementations and must be included in every update? (Choose two.)

Answer: A,B

Explanation:
BGP attributes are properties that BGP uses for route advertisement, path selection, and loop prevention 1
. There are four categories of BGP attributes 1 2 3 :
* Well-known mandatory: Must be recognized by all BGP routers, present in all BGP updates, and passed on to other BGP routers 1 2 3 .
* Well-known discretionary: Supported by all BGP implementations, and are optionally included in BGP updates 1 .
* Optional transitive: May not be supported by all implementations of BGP 1 .
* Optional non-transitive: May not be supported by all implementations of BGP 1 .
The well-known mandatory attributes must be supported by all BGP implementations and must be included in every update 1 2 3 . These include the AS path and next hop attributes 2 3 . Therefore, options A and C are correct.


NEW QUESTION # 90
You are a network operator troubleshooting BGP connectivity.
Which two statements are correct about the output shown in the exhibit? (Choose two.)

Answer: A,C

Explanation:
The local AS is 65400, as indicated by "Local AS: 65400".
The output shows "NLRI for this session: inet-unicast", which indicates that the routers are exchanging IPv4 unicast routes.


NEW QUESTION # 91
What are two purposes of an aggregate route? (Choose two.)

Answer: C,D

Explanation:
An aggregate route is a route that summarizes multiple more specific routes into a single route advertisement.
For example, an aggregate route to 10.0.0.0/8 can represent many routes to 10.x.x.x/24 subnets. An aggregate route has several purposes, such as:
To decrease the number of route advertisements: By consolidating multiple routes into one, an aggregate route reduces the size of the routing table and the amount of routing updates that need to be exchanged between routers. This can improve the scalability and efficiency of the network12.
To hide internal routes from external peers: By advertising only the aggregate route and not the more specific routes, an aggregate route can provide a level of abstraction and security for the internal network topology. This can prevent external peers from knowing the details of the internal routes and avoid potential attacks or misconfigurations13.
The other options are not correct because:
C). To allow external peers to see internal routes: This is the opposite of what an aggregate route does. An aggregate route hides the internal routes from external peers, not exposes them13.
D). To increase the number of route advertisements: This is also the opposite of what an aggregate route does. An aggregate route decreases the number of route advertisements, not increases them12.
References: Configuring Route Aggregation | Junos OS, JunOS Aggregate and Generate Routes - Network Direction, Aggregate Routes vs Generated Routes. | Junos OS - Juniper Networks


NEW QUESTION # 92
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