Wide Area Network (WAN) Introduction : A WAN is a connection of multiple locations to make a single network. WANs connect smaller networks (LANs- local area networks) across long distances. It extends over a large geographical area for the purpose of computer networking. WANs are used to connect LANs together so that users and computers located in one area can communicate with the users and computers located in another area. It interconnects connecting devices such as switches, routers or modems. Working Principle : There are two types of WANs: Point-to-point WAN and Switched WAN Point-to-point WAN A point-to-point WAN contains two connecting devices and a connection medium. They provide basic connectivity between the two devices. This kind of point-to-point WAN connection is also called a leased circuit or leased line because it is always available and you have the exclusive right to use it as long as you keep paying for it. Swit...