Terminology and Concept of The Internet

Internet:

Internet is a collection of thousands of individual networks and organizations, each of which is run on its own. Each network cooperates with other networks to direct Internet traffic so that information can pass among them. Together, these networks and organizations make up the world of the Internet. 

World Wide Web (WWW)

The World Wide Web (WWW) is just a small part of the Internet as whole. The Internet, relates to all the hardware and software involved, and in addition to the WWW, it also includes FTP (File Transfer Protocol), email, newsgroups etc.

Web sites and URLs

A web site is simple a group of files and folders which are stored on a WWW server and which can be freely accessed by people surfing the web. For instance Microsoft has a web site, from which you can download information and software.

URL (Uniform Resource Locator)

The URL (Uniform Resource Locator) is just another name for a Web address. The URL consists of the name of the protocol (usually HTTP or FTP) followed by the address of the computer you want to connect to e.g. a URL of http://www.Google.com  would instruct your Web Browser to use the HTTP to connect to the Google web site.