Web Server:

computer system that processes requests via HTTP, the basic network protocol used to distribute information on the World Wide Web is called Web server. The term can refer either to the entire system, or specifically to the software that accepts and supervises the HTTP requests.
FTP (File Transfer Protocol)
Features Of A Good Web Server
What Is Search Engine?
WWW (World Wide Web)
Over loading In Web Server?
Common features Of web Servers
Web servers are computers that deliver (serves up) Web pages. Every Web server has an IP address and possibly a domain name. For example, if you enter the URL http://www.globalguideline.com/index.html in your browser, this sends a request to the Web server whose domain name is globalguideline.com. The server then fetches the page named index.html and sends it to your browser.
Any computer can be turned into a Web server by installing server software and connecting the machine to the Internet. There are many Web server software applications, including public domain software from NCSA and Apache, and commercial packages from Microsoft, Netscape and others.