URL (Uniform Resource Locator or Universal Resource Locator) is the unique address for a file accessible on the Internet. To get to a Web site you usually enter the URL of its home page in your Web browser's address bar. A URL consists of three parts the

Service name to be used to access the file ,such as but not limited to

http://    hypertext transfer protocol

ftp://      file transfer protocol

Domain name  is unique name that identifies an Internet site like

Every domain name has a suffix that indicates the sites nature.

gov - Government site

edu - Educational site

org - Organizations

mil - Military

com - commercial site

net - Network organizations

au - Australia