An extranet is best described as

• A. An internal-only network
• B. A network accessible by external partners with authentication
• C. The public Internet
• D. A wireless network for guests

Answer: (B)

An extranet is a controlled extension of an organization's private network that lets external partners access defined resources after authentication. It enables collaborators such as suppliers or customers to reach a dedicated portal, shared data, or specific applications while the rest of the internal network remains protected. This access is secured with authentication and authorization, often using VPNs or secure web portals, plus firewalls and access controls to limit what external users can see. It’s not an internal-only network, not the public Internet, and not a guest wireless network, all of which don’t provide the secure, limited access that an extranet offers.