Your YourDomain trainee Jack asks you to describe Virtual Private Networking.
What should you tell her?

A.
VPN is an encrypted connection between endpoints.

B.
VPN is a remote client that is attached to a private network by an optical link.

C.
VPN is an Internet-based website that requires the user to submit a password to gain entrance.

D.
VPN is a connection that relies on synchronized password exchanges between the network and the user.