Desk-checking is also called pencil-tracing, because the programmer uses a pencil and paper to follow each of the algorithm's instructions.

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

A(n) ____________________ is used to define which part of an IP address is the network ID and which part of the IP address is the host ID.

Fill in the blank(s) with the appropriate word(s).