An intranet is a computer network that’s only accessible to an organization and its employees. It is a dedicated and exclusive hub where staff can safely communicate and share data. You can compare it to a private club with special services and privileges that are not open to the public. 

Intranet uses a local area network (LAN), a computer network that interconnects the computers of the different members of the intranet, where they hold office. In contrast, a company may also set up an extranet, a private network for exchanging information securely through the Internet with a select group of clients, suppliers, and customers.

Other interesting terms…