![]() Thus the CGI program generates a dynamic HTML page. The server then sends this formatted in HTML to your browser which in turn displays the HTML page. The CGI program processes this data and returns the results to the server. The server checks the headers and locates the necessary CGI program and passes it the data from the request including your search query “computers”. Your browser sends your request to the server. Let us also suppose you type in the word ‘computers’ as the search query. Let us suppose you come across a searchable form on a web page that runs a CGI program. Here the server has to do more work since CGI programs consume the server machine’s processing power. The scenario is slightly different for CGI applications. Model #2 of the client-server architecture – CGI Scripts Static pages do not change until the developer modifies them. The client then displays this file on your machine. The server locates this file and passes it to the client. The client (browser) requests for an HTML file stored on the remote machine through the server software. Let us now examine the client-server inter-communication with three models Model #1 of the client-server architecture – Static HTML pages The web employs a connection-less protocol, which means that after every client-server interaction the connection between the two is lost. Telnet Protocol: Used to open telnet sessions. ![]() ![]() SMTP (Simple Mail Transport Protocol): used for email.FTP (File Transfer protocol): employed for transferring files from one machine to the other.HTTP (Hypertext transfer Protocol): used on the World Wide Web (WWW) for transferring web pages and files contained in web pages such as images.The World Wide Web, which is a part of the There are many protocols available on the Internet. These protocols help in the accurate transfer of data through requests from a browser and responses from the server. Browsers interact with the server using a set of instructions called protocols. The client is usually a browser such as Internet Explorer, Netscape Navigator or Mozilla. Your computer runs software called the client and it interacts with software known as the server located at a remote computer. ![]() The Internet revolves around the client-server architecture. ![]()
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