When computers are spread over a large geographical area like intercity, intracity, across buildings etc and they still connected to one another in order to share information, then the configuration is called Wide Area Network(WAN). WAN are extensions of LANs. Two LAN’s connected by telephone lines and modems can act as WAN. A router which is special purpose computer and a network operating system is required to establish a connection. WAN, therefore enables clients to take full advantage of resource sharing as well as new practices like working alone from home, staying in closer contact with external suppliers, distributors and building links to remote branches and international offices. With this facility we can keep in contact with all those needed. The internet is an invention that changed millions around the world. It reduced the distances between people bringing in new innovations and making communication possible throughout the globe. Thus it has aided in our progress.