How do you address a message so that it reaches the appropriate destination? Traffic on the Internet reaches the correct destination through the use of name and address conventions. The "address" of a Web resource consists of the domain (for example, yahoo.com) plus additional information regarding the resource on the Web server (for example, yahoo.com/news/).
The full "address" is called a Uniform Resource Locator, or "URL."
www.amazon.com is a URL, while
Amazon.com is a domain name.
A URL specifies a unique address to a resource on the Internet.
A resource can be a specific
a document, or
URLs are sometimes called URIs, or Uniform Resource Identifiers, but URL is the more common term.
Parts of a URL
Delimiters, or marks, separate the parts of a URL address. In general, the first part of a URL indicates which protocol to use;
the second part specifies where the resource is located. The following MouseOver identifies and defines each part of a URL: