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Following figure shows the implementation of circuit switching technique:


                                      Dedicated
                                     Connections                                            Link

                          Terminal (1)                                                            Terminal (4)
                                                                      Link

                                                 Switch (1)                 Switch (2)
                                        Link                                                Link


                          Terminal (2)                         Switch (3)                         Terminal (5)


                                                              Dedicated                Dedicated
                                        Link                 Connections              Connections

                                                 Switch (4)                 Switch (5)
                          Terminal (3)                                                            Terminal (6)
              Features of Circuit Switching
              Some of the common features of circuit switching technique are as follows:

              Ð ÐIt provides full bandwidth and remains connected until the connection is terminated.

              Ð ÐIt is still unavailable to other users, even if there is no communication on a dedicated circuit.
              Ð ÐOne of the best examples of circuit switching technique is an early analog telephone network. This type of network
                 is known as circuit-switched network. When a call is made from one phone to another, switches in the telephone
                 exchange generate a continuous wire circuit between the two phones that lasts for the duration of the call.
              Packet Switching

              Packet switching is a data switching technique in which a data, to be sent, is divide into small pieces. These small pieces
              are known as packets (fixed-size blocks of data with any content, type, or structure). These packets are then routed
              individually between nodes through shared data lines.
              Following figure shows the implementation of the packet switching technique:

                                1   2   3   4

                                                             3
                                                                4
                     Terminal (1)
                                                Switch (1)                    Switch (2)

                                                        1
                                                                            3
                                                                               4
                                                        2
                                                               Switch (3)
                                                                1   2                   1   2   3   4



                                                Switch (4)                    Switch (5)               Terminal (2)

              Features of Packet Switching
              Some of the common features of packet switching technique are as follows:

              Ð ÐEach packet has a “header” that provides information needed to route it from source to destination.
               ÐPackets take shortest path as possible to travel across the network.
              Ð
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