What is an Extranet primarily used for?

An Extranet is primarily used to provide access to trusted partners or organizations. This is because an Extranet extends a company's intranet to include authorized users outside the organization, such as vendors, partners, or customers. By doing so, it facilitates secure sharing of information and collaboration between these trusted parties, while maintaining the privacy and control of internal data.

The functionality of an Extranet is pivotal for businesses that need to share information securely with third parties without exposing their entire network. This collaborative environment can support activities like joint projects, supply chain management, and customer relations.

The choice regarding connecting multiple internal networks refers more to an Intranet or VPN; isolating sensitive information typically describes a more secure internal network rather than sharing; and public access to databases usually pertains to public websites or open systems, which is distinct from the controlled access nature of Extranets.