单选题Which of these technologies is characterized as being a multipoint Layer 2 VPN that connects two or more customer devices using Ethernet bridging techniques?（）ADPTBMPLSCVPLSDCWDMEDWDMFSONET/SDH
单选题
Which of these technologies is characterized as being a multipoint Layer 2 VPN that connects two or more customer devices using Ethernet bridging techniques?（）
A
DPT
B
MPLS
C
VPLS
D
CWDM
E
DWDM
F
SONET/SDH
参考解析
解析：
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