This document discusses different types of network cables and computer network types. It provides information on coaxial cables, twisted pair cables, and fiber optic cables. It defines personal area networks (PAN), local area networks (LAN), metropolitan area networks (MAN), and wide area networks (WAN). The key points are: 1. Network cables such as coaxial, twisted pair, and fiber optic are used to connect devices and allow communication and sharing of resources over a computer network. 2. There are different types of computer networks including PAN, LAN, MAN, and WAN which connect devices over various distances ranging from 10 meters to worldwide. 3. PAN connects devices within 10 meters, L