The RJ45 Copper Ethernet interface is an essential component in wired networking, allowing devices to connect and communicate over a network. This interface utilises a physical connector known as an RJ45, which is a standard type of connector for network cables. The term "RJ" stands for "Registered Jack", while the number "45" refers to the specific wiring pattern used. The RJ45 connector is typically used with Ethernet cables, such as Cat5, Cat5e, and Cat6, to establish network connections. The RJ45 Copper Ethernet interface is designed to transmit data over copper wires, which are housed inside the Ethernet cable. Each RJ45 connector has eight pins, each of which connects to a wire within the cable. These wires are twisted into four pairs to reduce interference and maintain a consistent, high-speed connection. The RJ45 Copper Ethernet interface is widely used in both home and business networks due to its reliability, speed, and cost-effectiveness.