What is defined as a private, internal network that uses Internet applications?

The correct answer is B. An intranet is defined as a private, internal network that utilizes Internet applications for communication and information sharing within an organization. It typically allows employees to access internal resources, share documents, and collaborate effectively while maintaining a secure environment that is not accessible to the general public. This internal network often resembles the structure and functionality of the Internet but is restricted to authorized users within the organization.

Intranets leverage common Internet protocols and technologies (like web browsers and email) to facilitate internal communication and information dissemination efficiently. This makes them a vital tool for improving productivity, connecting employees, and ensuring that important information is easily available within the organization.