Page 15 - TP_Plus_v2.2_Class_8
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LAN                                                       LAN









                                                       Metropolitan Area Network

                      WAN (Wide Area Network)

                 It is a digital communication system that interconnects a large number of computers over 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                      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.




                                                                                       Tech Fact

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


                               Personal Area Network

                                                                                              Computer Networking  13
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