A Wide Area Network (WAN) is a data communications network that covers a large geographic area and often uses communication services provided by carriers.
Business and government entities use WANs to communicate data between employees, clients, buyers, and suppliers from a range of geographical locations. This mode of telecommunication allows a business to successfully complete its daily roles despite location.
WANs are used to connect Local Area Networks (LANs) and other kinds of networks together, so that users and computers can communicate with each other, even if they are in different parts of the world. Many WANs are built for a certain organization and are private. Others provide connections from an organization’s LAN to the internet. WANs are often built using leased lines. At each end of the rented line, a router links the LAN on one side with a second router inside the LAN on the other.