URL stand for Uniform Resource Locater specifies the distinct address of document and other resource on the world wide web (WWW). The concept of URL come to facilitate the assess of document distributed throughout the world. It is a standard for specifying any kind of information on the Internet. The URL defines four things: Method, Host computer, port and path. For example: Method:\\ host:port/path
the method is the protocol used to retrieve the document, i.e. HTTP. The host is the computer where the information is located i.e. WWW. The URL optionally can contain the port number of the server. It the port is included, it should be inserted between the host and the path and it should be separated from the host by a colon. Path is the path name of the file where the information is located. Example: HTTP://WWW.Microsoft.com.