What device is used to connect a computer to a wired network?

The device used to connect a computer to a wired network is an Ethernet cable. Ethernet cables are specifically designed for networking applications and provide a reliable and efficient way to transmit data between devices within a local area network (LAN). They connect computers, routers, switches, and other network devices, facilitating communication and data exchange.

Fiber optic cables are used to transmit data over longer distances at high speeds, but they require specific transmitters and receivers and are not typically used directly to connect a computer in most home or small office environments. Coaxial cables, while historically used in cable television and internet services, are not the standard for connecting computers to a wired network in modern setups. USB cables are primarily designed for connecting peripherals to a computer, such as printers, keyboards, or external drives, rather than for network connectivity.