Cables are the veins of a computer network.
Data is pumped through these wires, delivering information from point to point. Category 3 is used for telephone systems, and categories 4 and 5 are used for telephone and data networks. If you need the performance advantages of 100-Mbps Ethernet, or if you expect your network to grow significantly in the future, go with Category 5 cabling. To connect your network over UTP, a hub is needed. From there, individual cables are connected from the hub to each computer on the network.