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    1                        Computer Networking

                         Let’s surf

                             Computer Network                         Need for Computer Network
                             Advantages of Computer Network           Components of a Data Communication System
                             Network Terminologies                    Devices Required for a Network
                             Types of Networks                        Topology
                             Network Architecture                     Wireless Networking Technology
                             Protocol

                      Let’s PLug-in                                                                 Century   #Critical Thinking
                                                                                                       21 st
                                                                                                          #Communication
                                                                                                      Skills
                        Write any four methods of communication that you can think of.
                        1.  ____________________________                  2.  ____________________________

                        3.  ____________________________                  4.  ____________________________

                     The process  of connecting computers  and peripheral devices  with each other, so that  they  can
                     exchange data is called computer networking. Various hardware devices, protocols and software are

                     required for networking. In this chapter, you are going to learn about networking and the concepts
                     related to computer networking.

                            COMPUTER NETWORK

                     A computer network is a group of interconnected computer systems and other computing devices.
                     There are different kinds of computer networks that work in different ways. Networks may be very
                     small and simple or they may be complex as a global network like the Internet. There may be wired
                     or wireless connection between computers on the network.

                     The computers on the network can communicate with each other as well as work independently. Each
                     computer in a network is called a node. The computers in the network maybe linked through a cable,
                     hub, switch, NIC (Network Interface Card), modem or router.

                                                                                                  Computer Networking  7

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