What is the meaning of RJ-45 in networking?

RJ-45 refers to a specific type of connector used predominantly in networking for Ethernet cables. The term "RJ" stands for "Registered Jack," which indicates it is part of a standardized specification for telecommunications connectors. The number "45" designates the particular registration number associated with this connector type. RJ-45 connectors are widely utilized to connect devices such as computers, routers, and switches within a network, serving as the physical interface for data transmission over twisted-pair cables.

The reference to "Registered Jack 45" accurately describes this industry-standard connector, distinguishing it from other RJ connectors like RJ-11, which is typically used for telephone lines and has fewer wires. Understanding RJ-45 is essential for anyone working with networking hardware, as it forms the backbone of modern Ethernet networking.