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TCP/IP – Transmission Control Protocol/Internet Protocol: It is a network protocol that

                     defines how information or messages are routed from one end of a network to the other.
                      POP3 – Post Office Protocol Version 3: It is an Internet standard protocol that allows e-mail
                     clients to retrieve e-mail messages from an e-mail server.

                      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.  ............................ describes a computer that is connected to a network.
                         a. Node                                         c. Unit

                         b. Device                                       d. Attachment


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