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、DPTB、MPLSC、VPLSD、CWDME、DWDMF、SONET/SDH
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
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