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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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Which three things are the building blocks of the Cisco VPLS architecture？（）A、VLAN Trunk Protocol （VTP）B、State Synchronization Protocol （SSP）C、L2VPND、Ethernet Virtual Switch Interface （VSI）E、Label Distribution Protocol （LDP）
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单选题Which of these statements best describes VPLS?（）A
Neither broadcast nor multicast traffic is ever flooded in VPLS.B
Multicast traffic is flooded but broadcast traffic is not flooded in VPLS.C
VPLS emulates an Ethernet switch, with eachEMS being analogous to a VLAN.D
Because U-PE devices act as IEEE 802.1 devices, the VPLS core must use STP.E
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