Current course:

URL: Uniform Research Locator

Scheme server/root level path/directory file name

The site name is not case sensitive, however, depending on the server, the path and filename's ARE case sensitive. It's recommended to keep your path and filenames lowercase for ease of use.

Types of schemes:
HTTP:// HyperText Transfer Protocol (the default in most browsers)
FTP:// File Transfer Protocol used for downloading files
Mailto: email -
file:/// file on desktop or computer

Absolute path = entire path name. Example:
Absolute paths are used when linking to a site other than the one you're currently on.

Relative path = the path of the file relative to the current page. Example: /sports/soccer.html
Relative paths are used when linking to pages, images, css files... etc within the site your're currently on.