You are asked to design a Layer 2 VPN service between service provider networks that needs Ethernet transport capabilities. The VPN should support two or three endpoints.
Which Layer 2 VPN technology should you propose?
A . LDP-signaled VPLS
B . BGP-signaled VPLS, using the RFC 4448 Layer 2 frame format
C . LDP Layer 2 circuit, using the RFC 4448 Layer 2 frame format
D . BGP Layer 2 VPN
Answer: B