Page 10 - Plus_V2.2_C8_Flipbook
P. 10

Computer Network

                         NEED FOR COMPUTER NETWORK


                  Computers and other devices connected on a network help in:
                      Resource Sharing: It helps the users to share files and hardware devices such as printers, scanners,
                    etc.

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

                         ADVANTAGES OF COMPUTER NETWORK


                  The advantages of computer network are:

                     The information can be easily shared with others.
                     It reduces the cost of hardware.

                     Store information 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.
                     Reduction in installation cost.

                     User authentication process to secure the data.
                      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 DATA COMMUNICATION SYSTEM


                  A data communication system defines how data is transferred between computers is a networks.
                  There are mainly five components of a data 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 the data from another 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.


                   8    Premium Edition-VIII
   5   6   7   8   9   10   11   12   13   14   15