Which of the following functions is performed by a virtual private network (VPN)?

A. Hiding information from sniffers on the net

B. Enforcing security policies

C. Detecting misuse or mistakes

D. Regulating access

Explanation:

A VPN hides information from sniffers on the net using encryption. It works based on tunneling. A VPN does not analyze information packets and, therefore, cannot enforce security policies, it also does not check the content of packets, so it cannot detect misuse or mistakes. A VPN also does not perform an authentication function and, therefore, cannot regulate access.