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    Transmitter            Receiver     Transmitter        Receiver

                                                     Microwaves                    Microwaves

                                        End Station                Relay Station                 End Station
                          Infrared  waves: Infrared waves are used  for
                         short-range communication  and cannot  pass

                         through solid objects. They are commonly used in
                         TV remotes, wireless mice and security systems.          Television      Infrared       Remote
                                                                                                 Radiations
                       RAPID RECALL                             Tick ( ) if you know this.

                          1.  A transmission medium is the path or channel through which data travels from one
                              device to another in a network.

                          2.  Network architecture refers to the design and layout of a computer network.

                      TECH
                        T       ¢   Data packets: Data packets are small units of data transmitted over a network.
                        E
                        R       ¢   Media Access Control  (MAC) Address: A MAC  address  is  a unique  identifier  assigned
                        M
                        S          to a network interface card (NIC) or network device.

                      REWIND RUN

                      «   A computer network is a group of computers and other devices connected together to share resources
                         and information.
                      «   A client is a system or device that uses services and resources provided by a server in a network.
                      «   Data communication is the process of exchanging data between two devices.
                      «   A network protocol is a set of rules that are applicable for a network.

                      «   Network architecture refers to the design and layout of a computer network.
                      «   Topology describes the physical or logical layout of the network.

                       18
                            Premium Edition-VIII

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