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MAN (Metropolitan Area Network)

                  This network consists of  two or more local area networks or campus area networks together that
                  usually spans several buildings in the same city or town.










                                 LAN                                                               LAN











                                  LAN
                                                                  LAN                            LAN




                                                        Metropolitan Area Network

                       WAN (Wide Area Network)

                  It 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  type
                  of network, there may  not  be  physical  connection  between  computers.  In  WAN, telephone  lines,
                  microwave, satellite links, etc., can be used as transmission medium.








                                                  LAN                             LAN














                                                                  LAN







                                                            Wide Area Network

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