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.