bridge

1. In communications networks, a device that (a) links or routes signals from one ring or bus to another or from one network to another, (b) may extend the distance span and capacity of a single LAN system, (c) performs no modification to packets or messages, (d) operates at the data-link layer of the OSI–Reference Model (Layer 2), (e) reads packets, and (f) passes only those with addresses on the same segment of the network as the originating user.
2. A functional unit that interconnects two local area networks that use the same logical link control procedure, but may use different medium access control procedures.
3. A balanced electrical network, e.g., a Wheatstone bridge. Note: A bridge may be used for electrical measurements, especially resistances or impedances.
4. See hybrid coil.