Page 117 - iPro_trackGPT_V5_Class8
P. 117

These networks can be categorised  based on their  connectivity  methods, which  are  wired
                 networks and wireless networks. Each type of network serves different purposes and operates on
                 different scales ranging from local networks within a single building to vast networks spanning
                 across the globe.

                    NEED FOR COMPUTER NETWORK

                 Computers and other devices connected to 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 conferencing,
                    instant messaging, etc.

                    ADVANTAGES OF COMPUTER NETWORK

                 The advantages of computer networks are:
                    Facilitates quick and easy communication between users across various locations.

                    Allows multiple users to access and share resources like printers and files.
                    Stores data at one central location, making it easier to manage and back up information.
                    Reduces costs by sharing resources and services among multiple users.
                    Enables access to network resources from different locations via the Internet.

                    Easily expandable to accommodate additional users and resources as needed.
                    Provides centralised security measures to protect data from unauthorised access.

                    COMPONENTS OF A DATA COMMUNICATION SYSTEM
                 There are mainly five components of data communication system, which are as follows:

                    Sender: A sender is a computer that wants to send information to another computer on the
                    network.
                    Receiver: A receiver is a computer that is waiting to get information from another computer
                    on the network.
                    Transmission Medium:  The  transmission medium is a  communication  channel  through
                    which information travels from one computer to another.

                    Message: A message is the information or data being sent from one computer to another.
                    Protocol: A protocol is a set of rules that computers follow to communicate with each other.
                    NETWORK TERMINOLOGIES


                 There are several terms related to a computer network. Let us discuss some of them.
                 Server

                 A server is a computer that manages and shares resources like files and programs with other
                 computers (called clients) on the network. It provides a centralised storage area for programs,
                 data, and information. Servers can be categorised in the following category:
                    Dedicated server: A computer that performs a specific task, like hosting a particular application
                    or service.



                                                                                         Computer Networking     115
   112   113   114   115   116   117   118   119   120   121   122