Computer threats come from you as well as from outside intrusions

What is the error message when you attempt to use a cell that has been deleted as a function argument?

A) #NPV? B) #NAME? C) #REF! D) #N/A

A security engineer wants to implement a site-to-site VPN that will require SSL certificates for mutual authentication. Which of the following should the engineer implement if the design requires client MAC address to be visible across the tunnel?

A. Tunnel mode IPSec B. Transport mode VPN IPSec C. L2TP D. SSL VPN