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单选题
What is the BGP synchronization rule?()
A

Routing information received through an IBGP session is not forwarded to another IBGP neighbor, onlyto EBGP neighbors

B

Routing information received through an EBGP session is not forwarded to another EBGP neighbor,only to IBGP neighbors

C

BGP neighbor peerings are established and sychronized using the TCP 3-way handshake

D

BGP shall not advertise a route until that route has been learned via an IGP also


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