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(computer science)



(Uniform Resource Locator) The address that defines the route to a file on an Internet server (Web server, mail server, etc.). URLs are typed into a Web browser to access Web pages and files, and URLs are embedded within the pages themselves as links (see hypertext).

The URL contains the protocol prefix, port number, domain name, subdirectory names and file name. If a port number is not stated in the address, port 80 is used as the default for Web traffic (HTTP traffic). See port 80 and TCP/IP port.

Downloading the Home Page
To access a home page on a website, only the protocol and domain name are required. For example, http://www.computerlanguage.com retrieves the home page of the Computer Language Company's website. HTTP is the Web protocol, and WWW.COMPUTERLANGUAGE.COM is the domain name. Browsers default to the http:// prefix so only the www.computerlanguage.com needs to be typed in. In fact, you can usually omit the WWW and dot, because most websites treat blank hostnames as "www" hostnames. Sometimes, you can even omit the .com, and the browser fills it in automatically.

Another Web Page
If a page is not the home page, its name has to be part of the address, and a slash is used to separate it from the domain name. For example http://www.computerlanguage.com/about.htm points to the About page (about.htm file). See URL shortening.

The Full Path
If a page is stored in a subdirectory (folder within a folder), its name is also separated by a slash, and subdirectories can be several levels deep. Follow the example below:
Hypothetical URL:


 This:          Is the:

 http://        protocol

 www.car.com/   domain

 kia/           subdirectory

 used/          subdirectory

 2008.html      file (Web page)

Is It a URL or a URI?

Technically, a URL is a type of uniform resource identifier (URI). Since most URIs are URLs, "URL" is the term more commonly heard. See URI.
References in periodicals archive ?
Implicit in each of the above was the motivation to assess their impact on, or relevance to, ERL and the scarcity of prior research that would speak to these issues.
This 10 GbE iSCSI SAN illustrates ERL 2 iSCSI performance at 10 Gbits/s (Fig.
Erl, a retired CPA, was reading his newspaper in the living room at 3:45 p.
No wonder Newcastle Falcons chairman Dave Thompson, a member of the ERL board, said: "We are among the clubs committed to significantly developing our stadium further to allow more fans to come and experience top-flight rugby.
Worcester's place among the English rugby elite was confirmed by ERL board members in May after the National League One champions satisfied entry rules.
The MP,a keen rug by fan and a player in his youth at St Edwards School,in Liverpool,insisted he was prompted to act by genuine anger at the way the ERL had behaved.
Rotherham were once denied promotion on a technicality and owner Michael Yarlett believes this precedent should be observed by ERL when considering Worcester's application.
But although the RFU contingent on ERL believe Rotherham's promotion should be ratified immediately, the five-strong Premier Rugby group have requested more information.
Partly because of the limited battery life of most laptops, however, ERl tasks will mostly be defined by whatever sounds like fun.
has announced the appointments of Erl Swierkowski as president, Thermo King North America, and Randal Gast, vice president, Thermo King marketing and product management.
It is inventions such as the ERL that we spearhead in-house that push us to be the central infrastructure for encoding, hosting, and streaming music to websites worldwide.