單項選擇題In which state can BGP peers exchange Update messages?()

A.Active
B.OpenSent
C.OpenConfirm
D.Established
E.Idle


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1.單項選擇題In PIM-SM operations, the first router connected to the multicast source sends the Register message towhich device?()

A.Multicast source
B.Multicast receiver
C.RP
D.RP mapping agent
E.Designated Router (DR)

3.單項選擇題What is the role of Forwarding Equivalence Class (FEC) in MPLS?()

A.FEC determines how IP packets are forwarded in MPLS LSP.
B.FEC determines how to establish an LSP path.
C.FEC determines how a group of IP packets are mapped to an LSP.
D.FEC determines how MPLS labels are stacked in LSP.
E.None of above.

4.單項選擇題The IPv6 address FE80::656:78FF:FE9A:BCDE is what type of address?()

A.Site-local
B.Link-local
C.Multicast
D.None of the above