Network means two or more computers that are connected with one another for the purpose of communicating and exchange data electronically. Network system serves the important function of establishing a cohesive architecture that allows a variety of equipment types to transfer information in a near-seamless fashion.
There are many types of computer networks as follows:
- Local-area networks: The computers are geographically close together i.e in the same building.
- Wide-area networks: The computers are farther apart and are connected by telephone lines or radio waves.
- Campus-area networks: It is limited to geographic area, such as a campus or military base.
- Metropolitan-area networks: A data network designed for a town or city.
- Home-area networks: A network contained within a user’s home that connects a person’s digital devices.
There are two basic network types are local-area networks (LANs) and wide-area networks (WANs). LANs connect computers and peripheral devices in a limited physical area, such as a business office, Laboratory, or College campus.
LAN operating system software, which interprets input and instructs networked devices, allows users to communicate with each other; share the printers and storage equipment; and simultaneously access centrally located processors, data, or programs. LAN users may also access other LANs or tap into WANs. LANs with similar architectures are linked by “bridges,” which act as transfer points. LANs with different architectures are linked by “gateways,” which convert data as it passes between systems.
WANs connect computers and smaller networks to larger networks over greater geographic areas, including different continents. They may link the computers by means of cables, optical fibres, or satellites, but their users commonly access the networks via a modem (a device that allows computers to communicate over telephone lines). The largest WAN is the Internet, a collection of networks and gateways linking billions of computer users on every continent.