Which of the following best defines an extranet?

An extranet is best described as a network that allows access to outside users. This definition captures the essence of an extranet, which is essentially an extension of a private network that enables controlled access to specific outsiders, such as business partners, suppliers, or customers.

The purpose of an extranet is to facilitate collaboration and information sharing between the organization’s internal network and external users while maintaining a degree of security and privacy. This is particularly valuable in scenarios where secure access is needed for specific applications or data exchanges, allowing external stakeholders to connect and interact with the organization's resources.

In contrast, the other options do not accurately reflect the characteristics of an extranet. A public network open to all refers more generally to the internet and lacks the controlled access aspect. A private network for internal use only describes an intranet, designed solely for use by internal personnel, not allowing outsider access. A home network typically refers to a local network within a household, which also does not align with the concept of an extranet that is designed for collaborative purposes with designated external entities.