A Note On Uniform Resource Locator

1852 Words Oct 11th, 2015 8 Pages
A URL (Uniform Resource Locator, previously Universal Resource Locator) is the unique address for a file that is accessible on the Internet. Such a file might be any Web (HTML) page, an image file, or a program such as a common gateway interface application or Java applet. A common way to get to a web site is to enter the URL of its home page file in web browser 's address line. However, any file within that web site can also be specified with a unique URL. So the web pages of any website are identified by the URL. It contains the name of the protocol to be used to access the file resource, a domain name that identifies a specific computer on the Internet, and a pathname, a hierarchical description that specifies the location of a file in that computer.

When a URL is executed, the web server interprets the request and figures out what information needs to get sent back to the requestor. The URL gets broken up into its four distinct components –
1: The Protocol – It indicates over which framework data is being used to transmit back and forth. Most commonly used is “Hyper Text Transfer Protocol (HTTP)”. For transferring more sensitive information (E.g. Credit Card Information), secured hyper text transfer protocol (HTTPS) is used. A URL for a file meant to be downloaded using the File Transfer Protocol (FTP) would require that the "ftp" protocol be specified. The URLs used by ftp protocols have a slightly different syntax to the one used for HTTP.
2. The Hostname – It is…
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