Please compress the address 2001:0DB8:0000:C030:0000:0000:09A0:CDEF. ()

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Which of the following statements regarding Local-Preference in BGP is true?

• A.The default Local-Preference value is 100.
• B.Local-Preference can be transmitted between ASs.
• C.Local-Preference affects traffic that enters an AS.
• D.Local-Preference is a well-known mandatory attribute.

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Which of the following descriptions of the router's LSA processing principles are correct? (Multiple choice)

• A.If the router receives an LSA that is not available locally, it updates the LSDB and uses DD messages to flood the LSDB.
• B.If an LSA already exists in the local LSDB of the router and an updated LSA is received at this time, the local LSDB will be updated and the updated LSA will be flooded out.
• C.If multiple instances of an LSA are received, the highest priority is to check whether the checksums are the same. If they are not the same, the larger one is preferred.
• D.If the received LSA is damaged, such as Checksunm error, the LSA will not be received.

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Drag the following VRRP states to the corresponding working mechanisms.

Correct Answer:

Explanation:
Master
Backup
Master
Backup

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Which of the following descriptions of OSPF special areas is incorrect?

• A.The difference between the NSSA area and the Stub area is that the NSSA area allows the introduction of external routes to the autonomous system, and the ASBR issues Type 7 LSA advertisements to the area.
• B.The difference between the Stub area and the NSSA area is that detailed inter-area routes are not allowed to exist in the Stub area.
• C.The difference between a Stub area and a Totally Sub area is that detailed inter-area routing is allowed in the Stub area.
• D.The role of the Totally Stub area is to allow the ABR to publish Type 3 LSA default routes, and does not allow the existence of autonomous system external routes and inter-area routes.

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