Computer networking is the activity which establishes connections and enables communication between different computer systems, facilitating the sharing of resources. Computer networking includes hardware and software communication (e.g. modems, routers), as well as establishing protocols for internetworking.

Computer networking is a core part of the Information Technology discipline that connects two or more devices and allows them to communicate. The advancement of computer technology has seen an explosion in the amount of computers in society. Without the introduction of computer networking, computers would be irrelevant to our everyday life. It is because computer networks are interconnected that we are able to have the information available to us at any time and from any location.

Computer networking is one of the most in-demand skills in IT. If you're just starting out in IT, mainly with server administration, then this post will help get you started on the right path to learning computer networking.

Computer networking is the field of computer science that covers local area networks (LANs), wide area networks (WANs), wireless computer networks, and similar systems used to connect computers together over arbitrary distances. Computer networks differ in the transmission media used, the communications protocols to organize network traffic, the network's size, topology and organizational intent. In most cases, computer network implementations are documented in a computer network implementation specification.