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LAN                                        LAN








                  WAN (Wide Area Network)


                  WAN is a digital communication system that interconnects a large number of computers in
                  a wide geographical area. This network may operate on a worldwide or nationwide basis. In
                  such types of networks, there may not be a physical connection between computers. In WAN,
                  telephone lines, microwave, satellite links, etc., can be used as a transmission medium.







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                  PAN (Personal Area Network)

                  These are privately owned networks. PAN is used
                  to  establish  communication  among  computers
                  within the range of 20 to 30 feet. It can be wired
                  or wireless.




                   Clickipedia



                    The concept of PAN was first introduced by Thomas Zimmerman at M.I.T.'s Media Lab. It
                    was later supported by IBM's Almaden Research Lab.







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