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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
  • 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 3
  • 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 4
  • 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 5
  • 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 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
  • 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 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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Quiz Juniper - High Pass-Rate JN0-351 - Enterprise Routing and Switching, Specialist (JNCIS-ENT) Valid Braindumps Questions

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Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) Sample Questions (Q156-Q161):

NEW QUESTION # 156
You are using tunnels in your network. It is important that the routes be specific enough to ensure that the tunnels are established. You need to prevent a route that is new to the network from being used.
In this scenario, which type of route should be used?

Answer: D


NEW QUESTION # 157
Which two statements are correct about tunnels? (Choose two.)

Answer: A,B

Explanation:
A tunnel is a connection between two computer networks, in which data is sent from one network to another through an encrypted link. Tunnels are commonly used to secure data communications between two networks or to connect two networks that use different protocols.
Option B is correct, because tunnel endpoints must have a valid route to the remote tunnel endpoint. A tunnel endpoint is the device that initiates or terminates a tunnel connection. For a tunnel to be established, both endpoints must be able to reach each other over the underlying network. This means that they must have a valid route to the IP address of the remote endpoint 1 .
Option D is correct, because tunnels add additional overhead to packet size. Tunnels work by encapsulating packets: wrapping packets inside of other packets. This means that the original packet becomes the payload of the surrounding packet, and the surrounding packet has its own header and trailer. The header and trailer of the surrounding packet add extra bytes to the packet size, which is called overhead. Overhead can reduce the efficiency and performance of a network, as it consumes more bandwidth and processing power 2 .
Option A is incorrect, because BFD can be used to monitor tunnels. BFD is a protocol that can be used to quickly detect failures in the forwarding path between two adjacent routers or switches. BFD can be integrated with various routing protocols and link aggregation protocols to provide faster convergence and fault recovery. BFD can also be used to monitor the connectivity of tunnels, such as GRE, IPsec, or MPLS.
Option C is incorrect, because IP-IP tunnels are stateless. IP-IP tunnels are a type of tunnels that use IP as both the encapsulating and encapsulated protocol. IP-IP tunnels are simple and easy to configure, but they do not provide any security or authentication features. IP-IP tunnels are stateless, which means that they do not keep track of the state or status of the tunnel connection. Stateless tunnels do not require any signaling or negotiation between the endpoints, but they also do not provide any error detection or recovery mechanisms.
References:
1 : What is Tunneling? | Tunneling in Networking 2 : What Is Tunnel In Networking, Its Types, And Its Benefits? : [Configuring Bidirectional Forwarding Detection] : [IP-IP Tunneling]


NEW QUESTION # 158
Exhibit

What does the * indicate in the output shown in the exhibit?

Answer: D

Explanation:
The exhibit shows the output of the command show vlans brief, which displays brief information about VLANs and their associated interfaces1.
The output has four columns: Routing instance, VLAN name, Interfaces, and Tagging.
The * symbol indicates that the interface is active, meaning that it is up and forwarding traffic1. This can be verified by the command , which displays the status of the interfaces2.


NEW QUESTION # 159
Which two multicast IP addresses are used for link-state update packets? (Choose two.)

Answer: C,D

Explanation:
Link-state update packets are used to flood link-state advertisements (LSAs) among OSPF routers. The destination IP address of these packets depends on the network type and the state of the interface. On broadcast and point-to-point networks, OSPF uses two IP multicast addresses: 224.0.0.5 for all OSPF routers and 224.0.0.6 for all designated routers (DRs) and backup designated routers (BDRs)12. If the interface state is DR or BDR, the link-state update packets are sent to 224.0.0.5. Otherwise, they are sent to 224.0.0.63. On non-broadcast networks, such as Frame Relay or ATM, link-state update packets are sent as unicasts to each adjacent neighbor3. Therefore, the correct answer is A and D. References: Understanding OSPF Areas | Junos OS, How OSPF Works - IP Routing [Book] - O'Reilly Media, Link state packet - Wikipedia


NEW QUESTION # 160
Which statement is correct about IP-IP tunnels?

Answer: C

Explanation:
IP-IP tunnels encapsulate IP packets within other IP packets, allowing them to traverse networks that wouldn ' t normally support the original IP packets. This encapsulation involves the TTL (Time-to-Live) of the inner packet being decremented as it traverses through the tunnel towards its endpoint.


NEW QUESTION # 161
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