A Network Cable, a Network Cable, is a medium for transmitting information from one Network device (such as a computer) to another. In our common LAN, there are many types of network cables. In general, a typical LAN will not use many different kinds of network cables to connect network devices. In a large network or wan, different kinds of networks are used to connect different types of networks together. In many kinds of network lines, which one to use depends on the network topology, network structure standard and transmission speed.