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[Hardware] JN0-351 Free Pdf Guide, New JN0-351 Test Registration

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【Hardware】 JN0-351 Free Pdf Guide, New JN0-351 Test Registration

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Juniper JN0-351 Exam Syllabus Topics:
TopicDetails
Topic 1
  • 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 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
  • 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 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
  • 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 (Q144-Q149):NEW QUESTION # 144
You are a network operator who wants to add a second ISP connection and remove the default route to the existing ISP You decide to deploy the BGP protocol in the network.
What two statements are correct in this scenario? (Choose two.)
  • A. IBGP updates the next-hop attribute to ensure reachability within an AS.
  • B. EBGP peers advertise routes received from IBGP peers to other EBGP peers.
  • C. IBGP peers advertise routes received from EBGP peers to other IBGP peers.
  • D. IBGP peers advertise routes received from IBGP peers to other IBGP peers.
Answer: A,C
Explanation:
A is correct because IBGP updates the next-hop attribute to ensure reachability within an AS. This is because the next-hop attribute is the IP address of the router that advertises the route to a BGP peer. If the next-hop attribute is not changed by IBGP, it would be the IP address of an external router, which may not be reachable by all routers within the AS. Therefore, IBGP updates the next-hop attribute to the IP address of the router that received the route from an EBGP peer1.
B is correct because IBGP peers advertise routes received from EBGP peers to other IBGP peers. This is because BGP follows the rule of advertising only the best route to a destination, and EBGP routes have a higher preference than IBGP routes. Therefore, IBGP peers advertise routes learned from an EBGP peer to all BGP peers, including both EBGP and IBGP peers1.

NEW QUESTION # 145
You have configured a GRE tunnel. To reduce the risk of dropping traffic, you have configured a keepalive OAM probe to monitor the state of the tunnel; however, traffic drops are still occurring.
Referring to the exhibit, what is the problem?

  • A. The "event link-adjacency-loss" option must be set.
  • B. The hold-time value must be two times the keepalive-time value
  • C. For GRE tunnels, the OAM protocol requires that the BFD protocols also be used.
  • D. LLDP needs to be removed from the gr-1/1/10.1 interface.
Answer: B
Explanation:
For GRE tunnel keepalive to function properly, the hold time should be set to at least twice the keepalive interval to ensure proper detection and recovery of the tunnel state. In the exhibit, both keepalive-time and hold-time are set to 10 seconds, which is not optimal. The hold-time should be at least double the keepalive-time value.
So, to fix the issue, you should configure the hold-time to be 20 seconds or more.

NEW QUESTION # 146
Which two statements correctly describe RSTP port roles? (Choose two.)
  • A. The designated port forwards data to the downstream network segment or device.
  • B. The root port is responsible for forwarding data to the root bridge.
  • C. The alternate port is a standby port for an edge port.
  • D. The backup port is used as a backup for the root port.
Answer: A,B
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 # 147
In addition to the MAC addresses, what information is stored in the bridging table? (Choose two.)
  • A. preamble of Ethernet packet
  • B. MAC learned time
  • C. ether type details
  • D. interface details
Answer: B,D

NEW QUESTION # 148
What is the default MAC age-out timer on an EX Series switch?
  • A. 30 seconds
  • B. 300 minutes
  • C. 300 seconds
  • D. 30 minutes
Answer: C
Explanation:
The default MAC age-out timer on an EX Series switch is 300 seconds. The MAC age-out timer is the maximum time that an entry can remain in the MAC table before it "ages out," or is removed.
This configuration can influence efficiency of network resource use by affecting the amount of traffic that is flooded to all interfaces. When traffic is received for MAC addresses no longer in the Ethernet routing table, the router floods the traffic to all interfaces.

NEW QUESTION # 149
......
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