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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

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

                      URL

                 It stands for Uniform Resource Locater. 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, Idea, BSNL (Bharat Sanchar Nigam Limited), MTNL

                 (Mahanagar Telephone Nigam Limited.), Jio, etc.
                      IP Address

                 An Internet Protocol (IP) address is an unique identification number assigned to a computer connected
                 to a network. It has two main functions: host or network interface identification and location addressing.
                 IP addresses are written and displayed in human-readable notations, such as 172.16.254.1.


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