Introduction to network cable

The network cable is the connecting line between the computer and the computer, and between the computer and other network devices. Commonly used network cables are twisted pair and coaxial thin cable [2].

It is simple to use coaxial thin cable for network connection, as long as each computer or network device is connected in series, but it is troublesome to maintain. If something goes wrong, the whole network may be paralyzed. To add or remove a computer from the network, you must stop the work of the network until you add or remove a computer before continuing to use it. At the same time, this method must adopt the bus topology, which is rarely used [2].

Twisted pair is composed of four mutually twisted copper conductors covered with insulating materials and wrapped in an insulating sheath. It can reduce the interference caused by clutter and suppress the attenuation of signal in the cable. If twisted pair cable is used, we can easily add or remove a computer from the network without interrupting the work of the network. The maintenance of the network is also relatively simple. If a network cable fails, it will only affect the computer or equipment connected to the twisted pair cable, and will not cause network paralysis. However, the use of twisted pair requires the addition of hubs or switches in the network, which increases the cost of the network