单选题With VPLS， which protocol is used for label exchange and PW signalling？（）AMP-BGPBLDPCDirected LDPDMTPEBGPFIGP
单选题
With VPLS， which protocol is used for label exchange and PW signalling？（）
A
MP-BGP
B
LDP
C
Directed LDP
D
MTP
E
BGP
F
IGP
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解析：
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