Ethernet cable is a type of networking cable used to connect computers, routers, switches, and other network-enabled devices. It is the most common type of network cable used in homes and offices. Ethernet cables are available in different lengths and speeds, and can be used to connect devices to a wired network. They are typically made of copper and are shielded to protect against interference. Ethernet cables are also used to connect devices to the internet, allowing for faster speeds and more reliable connections.