HTML Uniform Resource Locators Reference
Uniform Resource Locators
Uniform Resource Locator (URL) is a reference to a web resource specifying its location on the computer network and a mechanism for restoring it. A URL is a special type of Uniform Resource Identifier (URI), although sometimes these two terms are used interchangeably. In the majority web browsers, the URL of a web page is displayed above the page in an address bar.
A URL can be composed of words or an Internet Protocol (IP) address. Generally, users enter the name as they are easier to remember than numbers.
The syntax of a full Web address:
scheme://prefix.domain:port/path/filename
Explanation
| Point | Description |
|---|---|
| scheme | Specifies the type of Internet service. http/https is the most common. |
| prefix | Specifies a domain prefix. www is the default for http. |
| domain | Specifies the name of the Internet domain. |
| port | Specifies the port number at the host. 80 is the default for http. |
| path | Specifies a path at the server. If it is omitted, the resource will be located at the root directory. |
| filename | Specifies the name of a resource or document. |
Common schemes:
| Scheme | Description |
|---|---|
| http (HyperText Transfer Protocol) | Common web pages (non encrypted). |
| https (Secure HyperText Transfer Protocol) | Secure web pages (encrypted). |
| ftp (File Transfer Protocol) | Downloading or uploading files. |
| file | A file on your computer. |