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Definition: A URI is a standard global identifier for an Internet resource that may be local or remotely-accessible. URIs follow the same general syntax as URLs; in fact, URLs are one type of URI.

Whereas URLs always refer to network addresses (including a protocol specification, host name or address, and local path), a URI does not necessarily refer to a remote resource. For example, the URI file:///c:/ specifies a local directory. Because file does not refer to any specific network protocol, this URI is not also a URL.

Also Known As: Uniform Resource Identifier

Related Resources:

Basic Networking Directory
Learn more about computer networking “from the ground up” through these online resources.
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