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URI and URL:

. . . acronyms for Uniform Resource Identifier and Uniform Resource Locator respectively. URI is . . . an online address as a path for accessing certain information on the Web through Internet servers (source of quote)

The following explanation of URI vs URL quotes Ryan McDonough.

A URI is an identifier for some resource, but a URL gives you specific information as to obtain that resource. A URI is a URL and as one commenter pointed out, it is now considered incorrect to use URL when describing applications. Generally, if the URL describes both the location and name of a resource, the term to use is URI. Since this is generally the case most of us encounter everyday, URI is the correct term (source of quote).

McDonough later updated the above, emphasizing that the URI is an opaque identifier, a point made earlier by Tim Berners-Lee whose Weaving the Web Glossary defines both URI and URL. Berners-Lee has also written about the URI opacity axiom.

The essence of McDonough's update:

The idea behind URI Opacity is that you should not look at the string to make any inferences as to what is at the other end. The presence of a query string does not distinguish a URL from a URI. Both strings are URIs and URLs (source of quote).



 
 
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domain name extensions:

Here the word domain refers to a realm of control (dominion) or sphere of ownership on the Internet with its name represented by a segmented string. The segment that ends a domain name is its suffix (domain suffix), an extension that creates a top-level domain:

TechTarget.com explains that the top-level domain . . . is the last segment of the domain name. The TLD is the letters immediately following the final dot in an Internet address (source of quote). The website you are using has a dot com domain name extension as does another website, http://www.sitelocationassistance.com, in this enterprise and economic development network you are using. A third website of the network has the dot net,therefore, making it the Economic Development Network online.
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Uniform Resource Locator:

. . . an online address as a path for accessing certain information on the Web through Internet servers (see the definition of Internet server below). The Economic Development Network website pointed out in the above paragraph with all its component files and resources resides on an Internet server aka Web server. The http prefix for the example website (http://www.economicdevelopment.net) is its access protocol.

Tim Berners-Lee created uniform resource identifier specifications, HTTP and HTML and the first web client and server; thus, he invented the World Wide Web.

The unique domain name for the Economic Development Network website follows the access protocol. More can be added to its URL address string for accessing specific files and resources residing on its server. The examples .net suffix is its top-level domain name.

Wikipedia has a uniform resource locator article.
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Internet server:

. . . a computerized storage, retrieval, and distribution control system for web sites which functions to control retrieval and distribution of information across the Internet to web browsers as it is requested by users typically referred to as clients. Such servers are customized for Intranet hosting. Their overall function is basically to connect clients to the web. Server systems are accessed remotely using browsers and specified uniform resource identifiers or uniform resource locators. In general, the word server can be used to refer to a either the software program or computer on which it runs. Server system refers to both.
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Economic Development Services, Inc. / copyrights and all rights reserved / 12/08/13