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WIDE AREA NETWORK (WAN)
                  WAN covers a wide geographical area. In other words, it is a group of computers that are separated

                  by a large distance and tied together. It links different metropolitans and even countries across
                  national boundaries. The most popular example of WAN is the Internet: a collection of an infinite
                  number of computers spread across the world.


                            NETWORK ARCHITECTURE


                  The network architecture defines the overall design of the computer network. There are two types
                  of network architectures.

                  CLIENT-SERVER NETWORK

                  This is the most efficient  network architecture
                  consisting  of two  parts:  client  system  and
                  server system. One or more computers on the
                  network are designated as the server and all             Clients     Internet
                  the other computers connected to the network
                                                                                                                Server
                  are called the clients. The clients can request
                  the services from the server. This is called the
                  client-server network. The client does not share any of its resources but requests for the server’s
                  content.

                                                        PEER-TO-PEER NETWORK

                                                        An alternative to  the  client-server approach  is the  peer-
                                                        to-peer approach. There are no dedicated servers. All the
                                                        computers are equal and can share their resources to be used
                                                        by others and are therefore known as peers. This network
                                                        is  more  cost-effective  and  required  low maintenance  and

                                                        works well in a small environment.




                       Tick ( ) if you know this.
                       ▶    A network is defined as a group of devices that are linked together to share information, data
                           and resources.
                       ▶   The Internet is a collection of an infinite number of computers spread across the world.




                           TOPOLOGIES

                  Topology or structure is the layout of the connection formed between computers. The efficiency
                  and reliability of a network are determined by its structure. In other words, Topology refers to the
                  geometric arrangement of computers or nodes in a network.



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