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    Some common web browsers are ‘Netscape Navigator’, ‘Mozilla’, ‘Opera’, ‘Apple Safari’, ‘Google
                     Chrome’, ‘Lynx’ (Text only mode web browser) etc., Mosaic was the first graphical web browser.

                               Chrome         Microsoft Edge        Opera              Safari           Firefox

                          Web Server

                     A web server is the principal computer or server that stores the contents of different websites.
                     It provides data and information to computers on request which are connected to it through the
                     Internet. In other words, it can be said that it is a computer that stores data and runs software that is
                     designed to send web pages in file format when requested by web browsers. The server is usually a
                     computer of high configuration i.e., with large storage capacity and high-speed processor that stores

                     data and executes the instructions very fast.

                          Web Client

                     A client is any computer that requests information from the server and a web server is a computer that
                     stores the data & the source application. It is designed to accept requests from remote computers
                     and respond or send on the information as requested.

                     A web client is actually the browser on client’s computer that makes the requests to the remote
                     server. A computer that uses a web (Client) browser is referred to as a web client.

                            CLIENT-SERVER ARCHITECTURE

                     Client-server architecture is defined as an arrangement of computers in which several computers are
                     requesting for some web pages/resources from a centralised computer, also known as web server.
                     The server then responds by giving the requested web pages/resources to the clients. Following
                     figure shows the client-server architecture:

                                                 12 12:0000 :
                                               20 20 2 20
                                              FaceTime  Calendarr C en l a  d a  Ph Photosotos  ai M Maill
                                                ! ! !  A A
                                                                     Internet
                                              Weather  Notes Notes  Reminders Reminders  App Store App Store
                                              Instagram  Facebookk  Tw Twitterr e i tt  Whatsapppp hats W  a
                                                       Clients
                                                                                           Server

                                                                                                    Web Programming    9

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