Three types of cables are used for connecting computers in a network are as follows:
1. Twisted Pair Cable It consists of two insulated wires twisted around each other and uses copper as the conducting material. This property of twisted pair cable provides protection against crosstalk and noise.
2. Co-axial Cable It contains two conductors, the inner conductor made of solid copper and the outer conductor that serves as a shield against noise. An insulating plastic is placed between the two conductors and this whole set-up is covered with a plastic jacket. For cable TV network co-axial cable is used.
3. Optical Fibre It consists of thin strands of glass or glass like material, which are capable of carrying light signals from a source at one end to another end.
