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    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 which needs to be transferred from one computer
                       to another.
                       Protocol: A protocol is a set of standard rules used for communication.

                            NETWORK TERMINOLOGIES

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

                          Server
                     A server is also called host computer. It controls the access to the hardware and software on the

                     network. It provides a centralised storage area for the programs, data and information.
                       The server which performs a specific task is called a dedicated server.

                       The server which manages the printers and documents being printed is called the print server.
                       The server which stores and provides the access to a database is called a database server.
                       The server which manages the network traffic is called a network server.
                       The server which delivers the requested web pages to our computer is called a web server.

                          Client

                     Client is a computer which depends on the server for all the resources. For example, a server might
                     store a network version of Excel program. Every client on the network can access the Excel program

                     from the server.

                          Internet
                     Internet is a global network of millions of computers and computer networks all over the world. It

                     allows us to access and share information over the network. The Internet contains billions of web sites
                     to provide information.

                          Intranet

                     Intranet is a computer network that is used for sharing information, devices and other computing
                     services only within an organisation.

                          URL

                     It stands for Uniform Resource Locator. It is the address of a website like www.google.com and www.
                     rediffmail.com.

                          ISP

                     It stands for Internet Service Provider. It is a company that provides Internet access on payment of
                     a monthly fee. Some of the ISPs are Airtel, Vi (Vodafone Idea), BSNL (Bharat Sanchar Nigam Limited),

                     MTNL (Mahanagar Telephone Nigam Limited.), Jio, etc.

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