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SMTP – Simple Mail Transfer Protocol: It is an e-mail protocol for sending e-mail messages
                     across the Internet.

                        Restart


                       The computer network means the system of interconnected computers.

                       The components needed for a network are Network Interface Card, networking cable,
                      hub or a switch and router.
                       The different types of networks are PAN, CAN, LAN, MAN and WAN.
                       Various types of topologies used in a network are bus, star, tree, ring and mesh.
                       There  are  two  types  of  computer  network  architectures—peer-to-peer  network  and
                      client-server network.

                       It is  the most popular wireless  communication technology used for homes,  private
                      business LANs and public hotspots.
                       Bluetooth  is a  technology  that  enables  wireless communication between  low-power
                      consumption devices within a short range.

                       Protocol is a set of rules that governs the communication between the computers over
                      a network.




                                                          Checkpoint




                 A.   Tick ( ) the correct option.
                            ü
                      1.    ...................... describes a computer that is connected to a network.

                            a.  Node                                    c.  Unit

                            b.  Device                                  d.  Attachment

                      2.    A computer network that spans across a city can be called a ...................... .

                            a.  LAN                                     c.  MAN

                            b.  WAN                                     d.  CAN

                      3.    ...................... can convert the digital data into analog signal and vice versa.

                            a.  Hub                                     c.  Router
                            b.  Modem                                   d.  LAN Card


                      4.    A computer network that can be used only within an organization is called ...................... .
                            a.  Internet                                c.  Both a and b

                            b.  Intranet                                d.  None of these


                                                                                         Computer Networking          17
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