Which statement is true regarding intranet usage in a company?

The statement highlighting that intranet usage is primarily for internal communication is accurate because an intranet is designed as a private network accessible only to a company's internal stakeholders. It typically facilitates communication, collaboration, and sharing of resources among employees. Employees can share documents, conduct discussions, and access essential company information without the risk of external interference.

The other choices do not accurately describe the nature of an intranet. While some systems may connect with external users, an intranet is specifically intended to be internal. It is not open to the public, as that would define an extranet instead. Additionally, an intranet functions as a communication and collaboration tool rather than serving the purpose of a backup system for data, which would be handled by dedicated data storage or backup solutions.