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IMAP –  Internet Message Access  Protocol:  It is an  e-mail protocol  that  stores e-mail

                     messages on a mail server and allows the user to view, access, and manipulate the messages
                     on the mail server from their computer.
                      SMTP – Simple Mail Transfer Protocol: It is an e-mail protocol for sending e-mail messages
                     across the Internet.
                     Reb             t



                          A computer network is a system of interconnected computers.
                          The components needed for a network  are  a Network  Interface  Card,  networking
                         cable, hub or a switch, and a router.
                          Network Interface Card allows the computer to connect to a network through a wired
                         or wireless medium.
                          Hub is a hardware device that has various boxes to which the computers, printers, and
                         other networking devices are connected.
                          Router is a networking device used to connect and facilitate the transfer of data in the
                         form of packets between two networks.
                          MODEM stands for MODULATOR–DEMODULATOR. It is a hardware device that allows
                         a computer to send and receive data over a telephone line.
                          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.
                          WiFi is the most popular wireless communication technology used for homes, private
                         businesses, 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 govern the communication between computers over a
                         network.



                    OneOne Touch           Learn                                              Section A (Objective)



                            ✓
                  A.  Tick ( ) the correct option.
                      1.  Which of the following describes a computer that is connected to a network?

                         a. Node                                         b. Device
                         c. Unit                                         d. Attachment


                      2.  Which of the following is a computer network that spans a city?
                         a. LAN                                          b. WAN

                         c. MAN                                          d. CAN



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