Which DMZ configuration uses one firewall with three interfaces?

A.
back-to-back configuration

B.
three-leg perimeter configuration

C.
basic configuration

D.
perimeter configuration

Explanation:
Section Reference: Redefining DMZ
In a three-leg perimeter configuration, the DMZ isusually attached to a separate connection of the company
firewall. Therefore, the firewall has three connections: one to the company LAN, one to the DMZ, and one to the
Internet.