An extranet is an Internet site that is accessible to a select group of people.

		An Extranet provides the ability to create applications that associates and customers can access, but that are not accessible to the general public.
		Extranets can use encryption and password protection to secure access to the site.
		For business-to-business transactions, Extranets enable secure electronic commerce.
		An Extranet can automate information-sharing by providing access to specific information and controlled access to internal databases.

An Internet site is accessible by anyone with a connection to the World Wide Web, while an Intranet site is accessible only by employees.