多项选择题

Which three functions can CCC be used for？（）

A.To interconnect VLANS
B.To interconnect ATM VCs
C.To interconnect MPLS LSPs
D.To interconnect MPLS VPNs

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单项选择题

A.IGP
B.LDP
C.BGP
D.RSVP

多项选择题

A.Circuit ID
B.VPN label
C.Route target
D.VPN number
E.Route distinguisher

单项选择题

A.Both use LDP
B.Both use BGP
C.Both require additional hardware.
D.Both use a two-label stack for forwarding.