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LAN (Local Area Network)

                 LAN is a short form of Local Area Network. It is a digital communication
                 system that interconnects a large number of computers and other
                 peripheral devices within a radius of less than 1 km. This type of
                 network is usually preferred for a smaller area such as a residence,
                 school, laboratory, university campus, or office building. By using the
                 LAN network, users can exchange data and messages in an easy and
                 fast way. Cables, Wireless Access Points (WAPs), and communication
                 devices are used to connect computers to the LAN.

                 MAN (Metropolitan Area Network)

                 MAN 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






                 WAN (Wide Area Network)

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







                      LAN                       LAN                                    LAN                       LAN











                                                      LAN                        LAN







                                   Imagine computer networks as highways in the sky. What vehicles would travel on these
                                   highways, and what destinations would they reach?






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