A Repeater is a device that regenerates signals so that the signal can travel on additional cable segments. They do not translate or filter data. For a repeater to work, both segments that the repeater joins must have the same media access scheme, protocol and transmission technique.

Repeaters can move packets from one medium to another. Some multiport repeaters can connect different types of media. Repeaters improve performance by dividing the network into segments, thus reducing the number of computers per segment.