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    Transmitter            Receiver     Transmitter        Receiver

                                                     Microwaves                    Microwaves

                                                                                                                                                1.  Tick ( ) the correct option.
                                                                                                                                                    a.  Identify the network device that converts digital data into analog signals or vice versa.

                                                                                                                                                          (i)  Modem                                      (ii)  Hotspot
                                                                                                                                                         (iii)  Router                                   (iv)  Bridge
                                                                                                                                                    b.  Select the device that connects multiple computers within a Local Area Network (LAN).
                                        End Station                Relay Station                 End Station
                                                                                                                                                          (i)  Modem                                      (ii)  Switch
                                                                                                                                                         (iii)  Router                                   (iv)  Bridge
                         Infrared  waves: Infrared waves are used  for
                         short-range communication  and cannot  pass                                                                                c.  Mark the correct full form of LAN.
                         through solid objects. They are commonly used in                                                                                 (i)  Long Area Network                          (ii)  Local Area Network
                         TV remotes, wireless mice and security systems.                                                                                 (iii)  Light Access Node                        (iv)  Large Access Network
                                                                                  Television      Infrared       Remote
                                                                                                 Radiations                                         d.  Recognise the network that allows access only to members of a specific organisation.
                                                                                                                                                          (i)  Internet                                   (ii)  Web page

                                                                                                                                                         (iii)  Intranet                                 (iv)  Website
                           Tick ( ) if you know this.                                                                                               e.   Select the topology where all the devices are connected to a single central cable.
                           ▶   A transmission medium is the path or channel through which data travels from one                                           (i)  Star                                       (ii)  Bus
                              device to another in a network.
                                                                                                                                                         (iii)  Mesh                                     (iv)  Ring
                           ▶  Network architecture refers to the design and layout of a computer network.
                                                                                                                                                2.  Write 'T' for true and 'F' for false.
                                                                                                                                                    a.  MAN covers a smaller area than LAN.

                             Hashtag                                                                                                                b.   A network interface card is used to regenerate incoming electrical, wireless or optical signals.

                           #Data packets: Data packets are small units of data transmitted over a network.                                          c.  In mesh topology, every device is connected to all other devices in the network.
                           # Media Access Control (MAC) Address: A MAC address is a unique identifier assigned to a
                            network interface card (NIC) or network device.                                                                         d.  In a Point-to-Point network, each device can act as both a client and a server.

                                                                                                                                                    e.   Networks allow devices to communicate with each other, share files and access the internet.

                           REVISIT                                                                                                              3.  Fill in the blanks using the words from the help box.

                                                                                                                                                                              Guided, Star, CAN, Gateway, SMTP
                        ▶   A computer network is a group of computers and other devices connected together to share resources and
                          information.                                                                                                              a.                  is a device that connects dissimilar networks.
                        ▶   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.                                               b.                  is an Internet standard that is used for sending emails.
                        ▶   A network protocol is a set of rules that are applicable for a network.                                                 c.  In a                topology, all devices are connected to a single central switch.
                        ▶   Network architecture refers to the design and layout of a computer network.                                             d.                  media uses physical cables for data transmission.
                        ▶   Topology describes the physical or logical layout of the network.
                                                                                                                                                    e.                  connects multiple buildings or facilities within a specific area.

                       18   Premium Edition-VIII

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