Repeater

is a network device (amplifier) for physically connecting two network segments in order to extend the maximum possible length of the network. Example: The connection between two R. must generally not be longer than 100 meters within an Ethernet. If this is not sufficient, so-called remote R. must be used, which can bridge distances of up to one kilometer. A maximum of four R. are permitted in an Ethernet LAN.

Source: logipedia / Fraunhofer IML