An organization's private, internal network that transports information. Intranet uses the same software and standards the Internet, but is accessible only to members of the organization. It is protected from outside intrusion by a combination of firewalls and other security measures.
A private network that works like the Internet, except that it can only be seen by a select group of people, such as the employees of a company.
An Intranet belongs are often utilized by larger companies such as corporation or independent organization. Accessibility is given to only approved employees / members, with the Network Administrator setting the permission level. Like the Internet itself, intranet's are used to share information. An Intranet is also referred as LAN (Local Area Network).