Web servers are special types of computers that always connected to the internet and deliver content or services to users over the Internet. The main function of a web server is to store information, process the data and deliver output on web pages to clients. The Hypertext Transfer Protocol (HTTP) helps to communication between client and server. A Web server is the home of every websites and every computer on the Internet that contains a Web site has a Web server program as Apache, IIS, Novell’s, Lotus and many others. To change any computer into a Web server we have to install server software and connecting the machine to the Internet. Web server can be divided into two types as dedicated server and shared server. Dedicated server used by a single person or company but Shared server share among multiple company or users.