Which of the following NAT firewall translation modes allows a large group of internal clients to share a single
or small group of ROUTABLE IP addresses for the purpose of hiding their identities when communicating with
external hosts?

A.
Static translation

B.
Load balancing translation

C.
Network redundancy translation

D.
Dynamic translation

Explanation:
Port address translation (PAT) is a dynamic NAT translation. It maps one internal IP address to an external IP
address and port number combination. Thus, PAT can theoretically support 65,536 (2 16) simultaneous
communications from internal clients over a single external leased IP address.
Incorrect Answers:A: With static translation each private address is statically mapped to a specific public address.
B: There is no NAT implementation named Load balancing translation.
C: There is no NAT implementation called Network redundancy translation.

Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, New York, 2013, p. 606