Registered jack-45 (RJ45) is an eight-wire connector used to connect computers on local area networks. They were initially used as a telephone-only standard, but have since been applied to high-speed modems and other computer networks. An RJ45 cable is fundamentally utilized to connect devices over an Ethernet connection. Devices like computers, printers, network storage devices, and cable or DSL modems are able to use an RJ45 connection. Being able to identify an RJ45 cable is necessary when trying to connect devices to a network. The “RJ” in RJ45 stands for Registered Jack, a standard designation that originated with the Universal Service Ordering Code (USOC) scheme of the Bell System back in the 1970s for telephone interfaces.
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. RJ45 is a kind of connector, principally employed for Ethernet networking, which includes connection with computer network cards, wi-fi access points, data switches, routers. It is connected to each ending of Ethernet wires and serves as the principal source for transferring data. A LAN port is implemented by using the RJ-45 Ethernet socket on a computer or a network device. In a local network, all the client machines, server machines and network devices are joined together by a LAN port.
A WAN (Wide Area Network) port is used to establish a connection with an external network like the internet. The cables terminate with an RJ45, or registered jack 45, connector. The RJ45 connector is just the piece at the end of the Ethernet cable that’s inserted into the LAN port. Fun fact: The RJ45 connector’s widespread use in LANs is why the LAN port is sometimes referred to as an RJ45 port or an RJ45 Ethernet socket.
