An intranet is a private network accessible only to an organization's staff.Often, a wide range of information and services are available on an organization's internal intranet that are unavailable to the public, unlike the Internet.
The purpose of an intranet is to provide a vehivle for communication similar to the world wide web that is pertinent to the organization. By using internet technology communication is cheaper and easier than previous expensive proprietary hardware and software that was used for internal communication.