JN0-351 Tests, JN0-351 Unterlage

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Juniper JN0-351 Prüfungsplan:

ThemaEinzelheiten
Thema 1
  • 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.
Thema 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.
Thema 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.
Thema 4
  • 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.
Thema 5
  • Protocol Independent Routing: An essential domain for understanding routing components outside protocol dependencies, this topic enhances expertise in configuring, monitoring, and troubleshooting critical elements.
Thema 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.

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JN0-351 Unterlage - JN0-351 Demotesten

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Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) JN0-351 Prüfungsfragen mit Lösungen (Q15-Q20):

15. Frage
Which statement about the default action of MAC limiting is true when the number of MAC addresses has hit the limit set?

Antwort: A

Begründung:
According to the Juniper documentation 1 , MAC limiting is a feature that enhances port security by limiting the number of MAC addresses that can be learned within a VLAN. When the MAC limit is exceeded, the switch can perform different actions, such as ignoring, dropping, logging, shutting down, or disabling the offending port. The default action is to drop the packets with new MAC addresses and log a message 2 .
Therefore, the correct answer is B.
The other options are not correct because:
* A. The switch will not shut down the offending port for five minutes by default. This is a configurable action, but not the default one 2 .
* C. The switch will not flood traffic out of all ports for the offending MAC address by default. This is a possible consequence of ignoring the packets with new MAC addresses, but not the default action 2 .
* D. The switch will not shut down MAC learning on the offending port for five minutes by default. This is another configurable action, but not the default one 2 .
References: Understanding MAC Limiting and MAC Move Limiting | Junos OS , Configuring MAC Limiting | Junos OS


16. Frage
Which two statements about MACsec are true? (Choose two.)

Antwort: B,C


17. Frage
Referring to the exhibit, which configuration change is needed for an IS-IS Level 1 adjacency between R1 and R2?

Antwort: A


18. Frage
Which statement is correct regarding the use of the Junos OS "export" policy applied to a routing protocol?

Antwort: D

Begründung:
An export policy in Junos OS is applied to control which routes from the local routing table are advertised outward to a neighboring router or redistributed from one protocol into another (for example, redistributing static routes into OSPF). This is in contrast to an import policy, which filters or modifies routes being received from a neighbor before they are installed into the routing table.


19. Frage
Exhibit

Which command displays the output shown in the exhibit?

Antwort: B

Begründung:
* The output shown in the exhibit is a brief display of the Ethernet switching table, which shows the learned Layer 2 MAC addresses for each VLAN and interface 1 .
* The command show ethernet-switching table displays the Ethernet switching table with brief information, such as the destination MAC address, the VLAN name, the forwarding state, and the interface name 1 .
* The command show route forwarding-table displays the routing table information for each protocol family, such as inet, inet6, mpls, iso, and so on 2 . It does not show the Ethernet switching table or the MAC addresses.
* The command show ethernet-switching table extensive displays the Ethernet switching table with extensive information, such as the destination MAC address, the VLAN name, the forwarding state, the interface name, the VLAN index, and the tag type 1 . It shows more details than the brief output shown in the exhibit.
* The command show route forwarding-table family ethernet-switching displays the routing table information for the ethernet-switching protocol family, which shows the destination MAC address, the next-hop MAC address, and the interface name 3 . It does not show the VLAN name or the forwarding state.


20. Frage
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