It is the global address of documents and other resources on the World Wide Web. URLs have the following format:
protocol://hostname/other_information for
example, http:// www.vpuc.com /
The protocol specifies how information from the link is transferred. The protocol used for web resources is HyperText Transfer Protocol (HTTP). The protocol is followed by a colon, two slashes, and then the domain name. The domain name is the computer on which the resource is located. Links to particular files or subdirectories may be further specified after the domain name.
For example, the two URLs below point to two different files at the domain vpuc.com. The first specifies an executable file that should be fetched using the FTP protocol; the second specifies a Web page that should be fetched using the HTTP protocol.
