Network cables are cables used to transmit information within a network, and they are usually made of metal or glass. There are three common types of network cables: twisted pair, coaxial cable, and fiber optic cable.

A twisted pair is a data transmission line composed of many pairs of wires, and its characteristic is that it is cheap, so it is widely used. The twisted pair is used to connect with the RJ45 crystal head, and there are two types: STP and UTP. UTP is commonly used.

Coaxial cable refers to a cable that has two concentric conductors, and the conductor and the shielding layer share the same axis. It can support high-bandwidth communication on relatively long lines without repeaters, but it is large in size, high in cost, and troublesome to maintain.

Fiber optic cable transmits signals in the form of light pulses, so the material is mainly glass or organic glass. It consists of a fiber core, a cladding, and a protective jacket. The advantages of fiber optic cable are fast transmission speed, strong anti-interference ability, long transmission distance, but also high cost.