The DMZ does not normally contain:

A.
encryption server

B.
web server

C.
external DNS server

D.
mail relay

Explanation:
The DMZ usually contains web servers, mail servers, and external DNS servers.
Incorrect Answers:
B: A web server is usually located in the DMZ.
C: An external web server is usually located in the DMZ.
D: A mail server is usually located in the DMZ.References:
Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, New York, 2013, p. 629