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ii.  MAN and WAN
                     Ans.
                                                 MAN                                          WAN
                           Transmission speed is higher than WAN.           Transmission speed is less than MAN

                           Less noise and error                             More noise and error

                           Covers less area than WAN                        Covers huge area.
                           User has direct access to internal memory’s      User has no direct access to ROM


                       iii.  Virus and Worm

                     Ans.
                                               Virus                                       Worm
                           Require a host (executable file) for transmission.  Are standalone malicious malware.

                           Main objective is to consume system resources.  Main objective is to modify the data in the computer.



                           It is less harmful.                          It is more harmful.

                           User has direct access to internal memory’s   User has no direct access to ROM


                     2.  Identify the protocol:
                        i.  This protocol divides data into packets that the network can efficiently handle.
                        ii.  This is the protocol for transferring hypertext files over the Internet.
                       iii.  A protocol that allows two computers to communicate via a serial interface.
                        iv.   This protocol allows voice to be sent over a packet switched network rather than a public switched telephone
                           network.
                        v.  This protocol allows email to be sent over the Internet.
                   Ans.    i.  TCP
                         ii.  HTTP
                        iii.  PPP
                         iv.  VOIP
                         v.  SMTP

                     3.  List any three advantages of Star topology.
                   Ans.    i.  Data flows in one way, reducing the likelihood of packet collisions.
                         ii.  There is equal access to resources.
                         iii.  It is inexpensive to set up and expand.
                     4.  Explain (i) Node    (ii) Server
                   Ans.    i.  Node: A node is a computer that is connected to a network.
                         ii.   Server: A server is a computer that allows data, software, and hardware resources to be shared across a network.

                     5.  Identify the network device:
                          i.  A network device that links two networks that use separate protocols
                         ii.  An electronic device that amplifies and retransmits a received signal over a network.
                        iii.  A device that connects many computers in a LAN.
                         iv.  A network device that connects two networks that are not the same.


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