Commonly used network cabling are the ethernet crossover, fiber optic, twisted pair, and coaxial. In an unshielded twisted pair (UTP) each pair of wires is twisted together to prevent interference. The thick coating of the coaxial cable provides extra protection. An Ethernet crossover cable is used to connect two or more computers in a computer network. Fiber optic cable transmits data in the form of light rather than electrical signals and enables high data transmission.