What best describes a VPN?

• A. A cloud service for hosting websites.
• B. A device that isolates network segments.
• C. A private network over the public Internet that tunnels endpoints and may use two-factor authentication.
• D. A physical networking standard for local areas.

Answer: (C)

A VPN is a private network that runs over the public Internet, creating an encrypted tunnel between endpoints so that traffic can travel securely as if the devices were on the same private network. This setup often includes authentication, and two-factor authentication enhances security by requiring something you know (a password) and something you have (a token or device).

The other descriptions don’t match what a VPN does: a cloud service for hosting websites is about hosting resources rather than extending a private network; a device that isolates network segments refers to segmentation hardware like a firewall or router, not the remote connectivity function of a VPN; a physical networking standard for local areas describes Ethernet or Wi‑Fi, which are about local, not remote, networking.