The remote bridge connects spatially distant subnets at the MAC layer via private lines or wide area networks. A remote bridge is always used in pairs and installed at both end points of the connection of two LAN subnets.
Since the functionality of the remote bridge is housed in two halves of the device, one half of a remote bridge is also referred to as a "half bridge". A remote bridge can have one or more LAN ports as well as one or more remote ports and realize different connections at the same time. Since remote bridges have to compensate for very large capacity differences from the LAN to the wide area network, depending on the capacity of the DFV services, buffer space and buffer organization play a major role.