Which statement correctly describes a demilitarized zone (DMZ)?

A.
It is the computer system(s) between the outer and inner firewalls.

B.
It is the machine in which the database containing the metadata repository is installed.

C.
It is a protocol that uses the Secure Sockets Layer (SSL) to encrypt and decrypt user page
requests.

D.
It is a computing system that is ready to pick up application processing in the event that the
primary computing system fails.