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Free JN0-351 Exam Braindumps (page: 8)

Page 7 of 17
PDF with 107 Questions

Exhibit



Your BGP neighbors, one in the USA and one in France, are not establishing a connection with each other.
Referring to the exhibit, which statement is correct?

  1. The BFD liveness is set too low.
  2. The BFD liveness must be configured on the BGP neighbor.
  3. The BFD liveness must be configured on the BGP group.
  4. The BFD liveness is set too high.

Answer(s): B

Explanation:

The exhibit shows the configuration of BFD liveness detection for BGP at the global level, which applies to all BGP neighbors by default1. However, this configuration does not specify the session mode, which determines whether BFD uses single-hop or multihop mode to communicate with a neighbor2.
For single-hop BGP neighbors, which are directly connected on the same subnet, the session mode can be either automatic or single-hop. For multihop BGP neighbors, which are not directly connected and require multiple hops to reach, the session mode must be multihop2. Since your BGP neighbors are in different countries, they are likely to be multihop neighbors. Therefore, you need to configure the session mode as multihop for each neighbor individually at the [edit protocols bgp group group-name neighbor address bfd-liveness-detection] hierarchy level2. For example:
protocols { bgp { group usa { neighbor 192.0.2.1 { bfd-liveness-detection { session-mode multihop; } } } group france { neighbor 198.51.100.1 { bfd-liveness-detection { session-mode multihop; } } } } } If you do not configure the session mode for multihop neighbors, BFD will use the default mode of automatic, which will try to use single-hop mode and fail to establish a BFD session with the remote neighbor2. This will prevent BGP from using BFD to detect liveliness and failover. Therefore, the answer B is correct, as you need to configure the BFD liveness detection on the BGP neighbor level with the appropriate session mode for multihop neighbors.



Which two statements are true about the default VLAN on Juniper switches? (Choose two.)

  1. The default VLAN is set to a VLAN ID of 1 by default
  2. The default VLAN ID is not assigned to any interface.
  3. The default VLAN ID is not visible.
  4. The default VLAN ID can be changed.

Answer(s): A,D

Explanation:

On Juniper switches, the default VLAN is set to a VLAN ID of 1 by default12. This means that all interfaces on the switch are members of VLAN 1 until they are specifically assigned to another VLAN12. Therefore, option A is correct.
The default VLAN ID can be changed12. This allows network administrators to configure the switch to use a different VLAN as the default, if necessary12. Therefore, option D is correct.



You need to configure a LAG between your switches. In this scenario, which two statements are correct? (Choose two.)

  1. Duplex and speed settings are not required to match on both participating devices.
  2. Duplex and speed settings are required to match on both participating devices.
  3. Member links are not required to be contiguous ports.
  4. Member links are required to be contiguous ports.

Answer(s): B,C

Explanation:

B is correct because duplex and speed settings are required to match on both participating devices. According to the Juniper Networks documentation1, all the interfaces in a LAG must have the same speed and be in full-duplex mode. This ensures that the LAG can operate as a single logical link without any performance or compatibility issues.
C is correct because member links are not required to be contiguous ports. According to the Juniper Networks documentation2, you can group any Ethernet interfaces on a switch into a LAG, regardless of their physical location or slot number. This provides flexibility and scalability for configuring LAGs on switches.



Exhibit



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

  1. The switch ports have a router attached.
  2. The interface is down.
  3. The interface is active.
  4. All interfaces have elected a root bridge.

Answer(s): C

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 show interfaces terse, which displays the status of the interfaces2.






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