Learn the definition, characteristics, types, and examples of computer networks . Find out how to connect computers, servers, routers, switches, and other devices using cables, wireless, or internet technologies. What is a computer network? A computer network is a group of interconnected nodes or computing devices that exchange data and resources with each other . A network connection between these devices can be established using cable or wireless media. Learn the definition, characteristics, advantages and disadvantages of different types of computer networks , such as LAN, MAN, WAN and PAN. Compare and contrast the features and applications of each network type with examples and diagrams. A Computer Network is a system where two or more devices are linked together to share data, resources and information . These networks can range from simple setups, like connecting two devices in your home, to massive global systems, like the Internet.