Computer networking is a group of computers linked to each other that enables the computer to communicate with another computer and share their resources, data, and applications. These computers use sets of common communication protocols over digital interconnections for the purpose of sharing resources located on or provided by the network nodes. … They are identified by host names and network addresses. Its important to note that due to exposure to inter-connectivity these computers are prone to attacks by viruses. A computer network can be categorized by their size.

A computer network is mainly of four types

• LAN(Local Area Network)
• PAN(Personal Area Network)
• MAN(Metropolitan Area Network)
• WAN(Wide Area Network)