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URLs: Universal Resource Locators
Home >> HelpDesk >> HTML: The Language of the Internet >> URLs: Universal Resource Locators

Serving Your Community's Online Needs Since 1994.

URLs: Universal Resource Locators

Universal Resource Locators are the primary building block of the Internet. Often refered to as a url or simply a link, URL's are the Internet address of a document or resource.

The url is composed of two required elements...

  • the Internet service/protocol that is to be used to access this resource, and
  • the Internet address of the computer on which the resource is found

and may include a 'filepath' which specifies where the resoure can be found.

Internet Services/Protocols

Common Internet services that are used in urls include:

  • HTTP - Hypertext Transfer Protocol (the most common protocol used on the World Wide Web)
  • FTP - File Transfer Protocol
  • TELNET - A protocol that allows you to login and use a remote computer.

Internet Address

The internet address can take the form of...

www.chebucto.ns.ca

or it can be a numbered address such as:

205.

In addition, the address can include a 'port' specification such as ":80". Internet addresses are very specific and any errors including failure to include a port if appropriate can produce an error.

Examples:

A url usually takes the form...

protocol ://machine.name [:port]/directory / document.name

Example 1
http://www.chebucto.ns.ca/Help/Html/Urls.shtml

...is the url for this document.

Example 2
telnet://chebucto.ns.ca

...is the telnet url for Chebucto Community Net

Example 3
ftp://ftp.microsoft.com

...is the url for a busy ftp site

 


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