Free H12-821_V1.0 Exam Braindumps (page: 21)

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After which of the following parameters are modified does an IS-IS neighbor relationship need to re- established?

  1. The cost of an IS-IS interface is changed.
  2. The IP address of an ISIS interface is changed.
  3. The level of an ISIS interface is changed.
  4. The interval at which an IS-IS interface sends IIH packets is changed.

Answer(s): C

Explanation:

When the level of an IS-IS interface is changed, the adjacency must be re-established because IS-IS adjacencies are formed based on matching levels (Level-1, Level-2, or both). Other changes, such as cost or hello intervals, do not disrupt the existing adjacency but might impact routing metrics or timing .



To inject IGP routes into BGP routes, you can only use the network command.

  1. TRUE
  2. FALSE

Answer(s): B

Explanation:

IGP routes can be injected into BGP using multiple methods, not just the network command. The import-route command can also be used to redistribute IGP routes into BGP. The network command requires the route to exist in the routing table, while import-route allows direct redistribution .



In a route-policy, which of the following BGP attributes can be used in apply clauses?

  1. MED
  2. AS_Path
  3. Tag
  4. Local-Preference

Answer(s): A,D

Explanation:

In a route-policy, attributes such as MED (Multi-Exit Discriminator) and Local-Preference can be used in apply clauses to influence BGP route selection. Attributes like AS_Path and Tag are typically matched or filtered but not directly applied in the apply clause .



According to BGP route selection rules, the route with the higher Local_Pref is preferred.

  1. TRUE
  2. FALSE

Answer(s): A

Explanation:

According to BGP route selection rules, a higher Local_Pref value indicates a more preferred route. This rule is used to influence traffic flow within an autonomous system (AS), giving preference to routes with a higher Local_Pref for outgoing traffic .






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