An organization has implemented an IPSec VPN access for remote users. Which of the following IPSec modes would be the MOST secure for this organization to implement? 

Answer options:

A. Tunnel mode
B. Transport mode
C. AH-only mode
D. ESP-only mode

A

In both ESP and AH cases with IPSec Transport mode, the IP header is exposed. The IP header is not exposed in IPSec Tunnel mode.