HTTP is connectionless because most computer have a limit on the simultaneous connections they can accommodate. If this limit is exceeded then access is denied to further users.

A web server accepts requests from a web browser and sends back results in HTML. The most important feature of a web server is to execute programs with arguments supplied by the user.

A Web Server is a program running on the server which accepts requests from a browser and sends HTML documents. The browser and the web server communicate via HTTP.

CGI specifies how the server communicates with application programs. The application program communicates with a database server in order to get data.

The Hypertext Markup Language [HTML] is the standardized syntax used by the browsers which supports formatted information as well as forms based interfaces.

The cascading style sheet allows us to use the same style sheet on multiple HTML documents allowing us to maintain a distinctive but uniform look on all the pages of a Web site.

HTTP – Hyper Text Transfer Protocol. This is aprotocol for transferring HTML documents.

The full form of CGI is Common Gateway Interface. This defines how a web server communicates with an application program.

A URL (Uniform resource locator) is a globally unique name for every document that can be accessed on the Web.

The extra information of a site maintained at the client end is called as cookie. It is a small piece of text containing identifying information with an associated name.