Understanding a URL
a URL (Web Address)
The basic parts of a URL often provide "clues" to where a web page originates and who might be responsible for the information at that page or site.
URLs have three basic parts: the protocol, the server name and the resource ID. Look again at CSM Library's URL below to see these three parts. The protocol is shown at the beginning of the URL before the double slash (//); the server name is between the double slash (//) and the first single slash (/); and the resource id is everything after the first single slash (/).
Let's examine each part of this URL:
part: protocol (http://)
part: server name (www.smccd.edu/)
The server name always ends with a dot and a three-letter or two-letter extension called the domain name. The domain is important because it usually identifies the type of organization that created or sponsored the resource. Sometimes it indicates the country where the server is located. The most common domain names are:
which identifies company or commercial sites
If the domain name is two letters, it identifies a country, e.g. .us for the United States, .uk for the United Kingdom, .au for Australia, .mx for Mexico or .ca for Canada.
The server name for our library's Web site is: www.smccd.edu. The server name may also be the name of a Web site. (A Web site is a complete group of Web pages that are organized as a comprehensive set.) Web sites can be either all of the pages on one server (computer) or all of the pages under a specific subdirectory on a server. For CSM Library, the server name (www.smccd.edu) identifies the San Mateo County Community College District. The CSM Library Web site consists of all of the pages under the subdirectory: /accounts/csmlibrary.
part: resource ID (/accounts/csmlibrary/index.htm)