Which of the following BEST ensures that information transmitted over the Internet will remain
confidential?

A.
Virtual private network (VPN)

B.
Firewalls and routers

C.
Biometric authentication

D.
Two-factor authentication

Explanation:

Encryption of data in a virtual private network (VPN) ensures that transmitted information is not
readable, even if intercepted. Firewalls and routers protect access to data resources inside the
network and do not protect traffic in the public network. Biometric and two-factor authentication, by
themselves, would not prevent a message from being intercepted and read.