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    NEED FOR COMPUTER NETWORK

                  Computers and other devices connected on a network help in:

                       Resource Sharing: It helps the users share files and hardware devices such as printers, scanners, etc.

                       Communication: It helps us communicate with others through e-mail, video conference, instant
                     messaging, etc.

                       Data  Security: Networks enable the implementation of security measures such as firewalls,

                     encryption,  and  access controls  to  protect  sensitive  information  from unauthorized  access,
                     interception, and tampering.

                        ADVANTAGES OF COMPUTER NETWORK

                  The advantages of computer network are:

                      The information can be easily shared with others.

                      It reduces the cost of hardware.

                      Enables seamless collaboration by facilitating the exchange of data, files, documents, etc.
                      Information is stored in one centralised location.

                       Reliability implies backing up of information. If a system crashes, then the information is accessible
                     on another workstation for future use.

                      Installation cost is reduced.
                      The data is secured through user authentication process.

                       People will have access to all the information they need to get and share through e-mail and instant
                     messaging which saves time and money in passing information.

                        COMPONENTS OF A COMMUNICATION SYSTEM

                  There are mainly five components of a communication system, which are as follows:

                      Sender: A sender is a computer that wants to send information to other computer connected to the
                     network.

                      Receiver: A receiver is a computer which is expecting to receive data from other computer on the
                     network.
                      Transmission  Medium: A  transmission medium  is a communication  channel  through  which

                     information is transferred from one computer to another on a network.
                      Message: A message is the information or data that needs to be transferred from one computer to
                     another.

                      Protocol: A protocol is a set of standard rules used for communication.

                      12  Premium Edition-VIII

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