Uniform Resource Locator or URL
The standard addressing system for the World Wide Web. A URL consists of two parts: The first part indicates what protocol to use (for example http://), and the second part specifies the IP address or the domain name and the path where the desired
information is located (for example www.securityfocus.com/glossary).
A form of authentication that is in place to ensure that the user is authorized to use the services that he or she is requesting. The username also signifies the primary user or users of a particular computer.