What is a private network used exclusively by organizations called?

A private network used exclusively by organizations is referred to as an intranet. This network is designed for internal use, providing a platform for communication, collaboration, and information sharing within the organization. Unlike the internet, which is public and accessible to anyone, an intranet is restricted to authorized users, allowing organizations to maintain privacy, security, and control over their sensitive data and operations.

Intranets typically include internal websites, applications, databases, and various tools that facilitate workflow and enhance productivity among employees. This closed-off nature helps organizations manage their resources efficiently and creates a cohesive environment for their staff.

The other choices represent different types of networks: the internet is a vast public network accessible to everyone, an extranet is a private network that allows controlled access to outsiders (like business partners), and a public network is one that anyone can use without restrictions. Thus, the distinct definition of an intranet as an internal, organization-exclusive network makes it the correct choice.