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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

                      PAN (Personal Area Network)

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



                                                                                              Computer Networking  13
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