单项选择题

The mechanisms for distributing LDP are：（）

A.LDP and RSVP
B.RSVP and CEF
C.CEF and the FIB table
D.UDP and IP
E.A and B

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单项选择题

The show ip ospf database external command displays information about which OSPF LSA type？（）

A.LSA type 1
B.LSA type 2
C.LSA type 7
D.LSA type 3
E.LSA type 9
F.LSA type 5

单项选择题

What is the encapsulation mode for MPLS running on Ethernet？（）

A.Packet mode
B.Frame mode
C.Transparent mode
D.Channel mode
E.Tunnel mode

单项选择题

What is the action of "pop" in the context of MPLS switching？（）

A.It removes the top label in the MPLS label stack.
B.It adds a top label in MPLS label stack.
C.It replaces the top label in the MPLS label stack with another value.
D.It replaces the top label in the MPLS label stack with a set of labels.
E.None of above.