RJ45 is a type of information socket (communication outlet) connector in a wiring system. The connector consists of a plug (connector, crystal head) and a socket (module). The plug has 8 grooves and 8 contacts. RJ is short for Registered Jack, which means "Registered socket". In the FCC (Federal Communications Commission Standards and Regulations), RJ describes the interface of a public telecommunications network. The RJ45 of a computer network is the common name for the standard 8-bit modular interface.

RJ45 Connector:

• An 8-pin/8-position plug or jack is commonly used to connect computers onto Ethernet-based local area networks (LAN).
• Two wiring schemes–T568A and T568B–are used to terminate the twisted-pair cable onto the connector interface.