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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

                                                                                                  Computer Networking  13

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