URL

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URL

(computer science)

URL

URL

(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:

 http://www.car.com/kia/used/2008.html

 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 ?
Email delivers believable content and easily clickable URLs, which then can lead unintended victims to malicious web sites.
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What that statistics say is that any given (public) URL shortening service will likely be abused and at some point develop a bad reputation.
It's hard to understate the importance of having a great URL for a library website that is simple, crisp, and easily remembered.
(i) The first one is to filter URLs requests from client IP through a whitelist of second level domain names (SLDN).
Using a datasets of 384 phishing URLs and 506 legitimate URLs, a classifier was developed from this technique with an accuracy of 99.89%, false positive and negative rates of 0.0% and 0.01% respectively.
There has been a number of literature work reporting the identification of URL based phishing attacks.
"In case, the character length goes beyond 98 characters, the Origin Chip will not display any URL," the PhishMe duo quoted.
However, URLs containing digits from those sources (when they provide such URLs) are excerpted at higher rates.
Some Google+ users were also reporting that their existing Google Profile custom URLs are still working, so are wondering what might happen to them as the Google+ customer URLs roll out.
Users, part of the roll-out, will see a notification on the top of the homepage that says, "your page is preapproved for the custom URL: google.com/CUSTOM followed by a Claim URL button that you'll certainly want to push." Such users will also be notified via an email to prompt them about claiming theirs.
Symantec Intelligence reported earlier this year that spammers had set up their own URL shortening services to better conceal their spam sites and make them harder to block.