What is the primary use of an RJ-45 connector?

An RJ-45 connector is primarily used for Ethernet connections. This type of connector is found in networking environments where devices such as computers, routers, and switches communicate with each other over a local area network (LAN). The RJ-45 connector supports data transmission over twisted-pair cabling, enabling high-speed Internet access and network communication.

Ethernet networks use the RJ-45 connector due to its ability to handle the necessary bandwidth and provide a reliable physical connection among networked devices. Its standardized pin configuration allows it to comply with various Ethernet standards such as 10BASE-T, 100BASE-TX, and 1000BASE-T, which correspond to different speeds and network capabilities.

The other options represent different types of connectivity not associated with RJ-45 connectors. Telephone connections typically utilize RJ-11 connectors, USB connections are made with USB connectors, and coaxial connections use coaxial cable connectors. Each of these is distinct from the purpose and functionality that RJ-45 connectors serve in networking.