URL
A Uniform Resource Locator (URL), colloquially termed a web address,[1] is a reference to a web resource that specifies its location on a computer network and a mechanism for retrieving it. A URL is a specific type of Uniform Resource Identifier (URI),[2][3] although many people use the two terms interchangeably.[4][a] URLs occur most commonly to reference web pages (HTTP) but are also used for file transfer (FTP), email (mailto), database access (JDBC), and many other applications. Most web browsers display the URL of a web page above the page in an address bar. A typical URL could have the form HistoryUniform Resource Locators were defined in RFC 1738 in 1994 by Tim Berners-Lee, the inventor of the World Wide Web, and the URI working group of the Internet Engineering Task Force (IETF),[7] as an outcome of collaboration started at the IETF Living Documents birds of a feather session in 1992.[7][8] The format combines the pre-existing system of domain names (created in 1985) with
file path syntax, where slashes are used to separate directory and filenames. Conventions already
existed where server names could be prefixed to complete file paths, preceded by a double slash ( Berners-Lee later expressed regret at the use of dots to separate the parts of the domain name within URIs, wishing he had used slashes throughout,[9] and also said that, given the colon following the first component of a URI, the two slashes before the domain name were unnecessary.[10] An early (1993) draft of the HTML Specification[11] referred to "Universal" Resource Locators. This was dropped some time between June 1994 (RFC 1630) and October 1994 (draft-ietf-uri-url-08.txt).[12] SyntaxEvery HTTP URL conforms to the syntax of a generic URI. The URI generic syntax consists of a hierarchical sequence of five components:[13] URI = scheme ":" ["//" authority] path ["?" query] ["#" fragment] where the authority component divides into three subcomponents: authority = [userinfo "@"] host [":" port] This is represented in a syntax diagram as: The URI comprises:
"http://www.example.com/questions/3456/my-document" where: "/questions" is the first part of the path (an executable module or program) and "/3456/my-document" is the second part of the path named pathinfo, which is passed to the executable module or program named "/questions" to select the requested document.An http or
https URI containing a pathinfo part without a query part may also be referred to as a 'clean URL' whose last part may be a 'slug'.
A web browser will usually dereference a URL by performing an HTTP request to the specified host, by default on port number 80. URLs using
the Internationalized URLInternet users are distributed throughout the world using a wide variety of languages and alphabets, and expect to be able to create URLs in their own local alphabets. An Internationalized Resource Identifier (IRI) is a form of URL that includes Unicode characters. All modern browsers support IRIs. The parts of the URL requiring special treatment for different alphabets are the domain name and path.[19][20] The domain name in the IRI is known as an Internationalized Domain Name
(IDN). Web and Internet software automatically convert the domain name into punycode usable by the Domain Name System; for example, the Chinese URL The URL path name can also be specified by the user in the local writing system. If not already encoded, it is converted to UTF-8, and any characters not part of the basic URL
character set are escaped as hexadecimal using percent-encoding; for example, the Japanese URL Protocol-relative URLsProtocol-relative links (PRL), also known as protocol-relative URLs (PRURL), are URLs that have no protocol specified. For example, See also
Notes
Citations
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What type of reference is used to identify the location of web pages or files on the current website?URLs. The most common form of URI is the Uniform Resource Locator (URL), which is known as the web address.
What type of reference is used to identify the location of web pages quizlet?URL -an acronym for Uniform Resource Locator and is a reference (an address) to a resource on the Internet. Application - aka computer program or piece of software designed and written to fulfill a particular purpose of the user.
Which type of webpages will automatically adjust?A responsive web design will automatically adjust for different screen sizes and viewports.
What is the webpage that appears and your browser uses when it opens up?The Home button is used to return users to their default web page; the same page that loads when the browser is first opened.
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