WWW (World Wide Web):

FTP (File Transfer Protocol)
Features Of A Good Web Server
What Is Search Engine?
Over loading In Web Server?
Common features Of web Servers
The complete system of interlinked documents that use the HTTP protocol, residing on the Internet and accessible to users via a web browser.
  World wide web is important to know that this is not a synonym for the Internet.

What Web Consists:

The World Wide Web is a subset of the Internet. The Web consists of pages that can be accessed using a Web browser. The Internet is the actual network of networks where all the information resides. The terms Internet and World Wide Web are often used without much distinction. However, the two things are not the same. The Internet is a global system of interconnected computer networks. In contrast, the World Wide Web is one of the services transferred over these networks.