A URL (Uniform Resource Locator) is a technique to identify a specific location of a resource on the internet. Although the usage for different services varies, this is the raw format:
method://server[:port]/file[#anchor]
The method is the protocol used by the resource. These are:
file:/ pathname
file:// hostname/pathname
Use for local file connections, no special protocols required. Works just
like ftp (file transfer protocol)
http:// host [/path[/file.html]]
Use the HyperText Transfer Protocol to access the resource. This is the most common protocol for the web. If no path or file is given, it will request the servers default file, which is usually index.html. If no file is request and the default is not found, a list of files in that directory will be shown. Thus, http stands for HyperText Transfer Protocol. This tells the computer to transmit the following file in HyperText Markup Language (HTML).