About the OSPF calculating the shortest path tree phase, which of the following description is true?

• A.The Stub segment is calculated in the first stage, the routing node is calculated in the second stage
• B.The routing node is calculated in the first stage, the stub network segment is calculated in the second stage
• C.Stub network segment is calculated in the first stage, router node and transit network segment are calculated in the second stage
• D.The routing node and Transiti network segment are calculated in the first stage, Stub network segment is calculated in the second stage

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By default, VRP automatically aggregates the routes imported by BGP.

• A.True
• B.False

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Multiple BGP processes cannot be configured on a router.

• A.False
• B.True

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The configuration command for VRRP and BFD linkage is:

• A.bfd-session vrrp vrid 1 track session-name 1 reduced 100
• B.vrrp vrid 1 track bfd-session session-name 1 reduced 100
• C.track vrrp vrid 1 bfd-session session-name 1 reduced 100
• D.vrrp vrid 1 track bfd-session-name 1 reduced 100

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Which of the following default route delivery methods does OSPF support? (Multiple choice)

• A.Can be sent up and down in ASBR
• B.Can only be issued by force
• C.Can be issued non-mandatory
• D.Can be sent up and down in ABR

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