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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
            that consists of two parts: client system and
            server system. One computer is designated
            as the server and all the other computers                Clients     Internet

            connected into the network are called the
                                                                                                          Server
            clients. The clients can request 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 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 is determined by its structure. In other words, Topology refers to the
            geometric arrangement of computers or nodes in a network.





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