Updated: 06/21/2017 by Computer Hope

RJ-45 connectorShort for Registered Jack-45, a RJ-45 is an 8-pin connection used for Ethernet network adapters. This connector resembles the RJ-11 or 6-pin connector used with telephones in the United States, but they're completely different. The picture is of a RJ-45 connector separated from the cable.

This connector is most commonly connected to the end of Cat5 cable, which is connected between a computer network card and a network device such as a network router.

Connection, Network terms