Network cables are essential components used to connect devices within a computer network. They transmit data between computers, routers, switches, and other network devices. Common types of network cables include Ethernet cables, which are widely used for wired connections, and fiber optic cables, which use light to transmit data over longer distances at higher speeds. These cables come in various categories, such as Cat5e, Cat6, and Cat6a, each offering different performance levels. The choice of cable depends on the network's speed requirements and distance. Proper installation and maintenance of network cables are crucial for ensuring reliable communication and data transfer.