单项选择题

Within a BGP confederation how are routing loops avoided?（）

A. split horizon
B. the AS-path attribute
C. the BGP cluster ID attribute
D. the BGP originator ID attribute

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单项选择题

Which action does a BGP speaker take when it detects that the reset state bit is set in an openmessage?（）

A. It tears down the BGP session.
B. It sends a restart message to the peer.
C. It marks all routes from that peer as stale.
D. It sends a BGP refresh message to the peer

单项选择题

If the policies shown below evaluate as described, which action will occur for the listed policy expression?（）
Policy A=True
Policy B=True
Policy C=True
Policy D=False
Policy Expression: !(A&&B)||C

A. The policy evaluates to True (a&&n).
B. The policy evaluates to True because of c.
C. The policy evaluates to False because of c.
D. The policy evaluates to False because of !(a&&b).

单项选择题

Which router translates the Type 7 LSAs into Type 5 LSAs, according to RFC 1587 (OSPF NSSAOption) in an OSPF NSSA with more than one ABR?（）

A. The router receiving the route translates the Type 7 LSA into a Type 5 LSA.
B. The ABR with the lowest router ID translates all Type 7 LSAs into Type 5 LSAs.
C. The ABR with the highest router ID translates all Type 7 LSAs into Type 5 LSAs.
D. All ABRs translate the Type 7 LSAs into Type 5 LSAs depending on which one has the lowest cost to the route.