Where is a DMZ located?

Where is a DMZ located?

A.
Behind the first Internet firewall

B.
In front of the first Internet firewall

C.
Behind the first network active firewall

D.
Behind the first network passive Internet HTTP firewall

Explanation:
RFC 2647 defines a DMZ as a network segment or segments located between
protected and unprotected networks. A DMZ is located directly behind the first
Internet firewall.