VPLS
Virtual Private LAN Services (VPLS) is a class of VPN that supports the connection of multiple sites in a single bridged domain over a managed IP/MPLS network. VPLS allows you to extend your Ethernet LAN across your Wide Area Network (WAN) and combine it into a single network that gives you the privacy of Private Line, performance of MPLS and the scalability of Ethernet. VPLS presents an Ethernet interface to customers, simplifying the LAN/WAN boundary for Service Providers and customers, and enabling rapid and flexible service provisioning, because the service bandwidth is not tied to the physical interface. All services in a VPLS appear to be on the same LAN, regardless of location.