Which network type provides controlled access for specific business or educational purposes?

• A. Intranet
• B. Extranet
• C. Internet
• D. VPN

Answer: (B)

Extending access to selected external users while keeping the rest of the network private is the idea behind an extranet. It lets partners, suppliers, or educational collaborators log in and access only the specific resources they need, with authentication and access controls to keep other internal data secure. That targeted, externally shared access is what sets an extranet apart.

Intranets are for internal staff, not external collaborators. The Internet is a public network with broad access and minimal inherent restrictions. A VPN creates a secure tunnel to a private network for authorized users, but it isn’t by itself a model for sharing parts of a network with external partners; it’s a method to securely connect to a private network.