In which state must a computer system operate to process input/output instructions?

A.
User mode

B.
Stateful inspection

C.
Interprocess communication

D.
Supervisor mode

Explanation:
A computer is in a supervisory state when it is executing these privileged instructions. (privileged
instructions are executed by the system administrator or by an individual who is authorized to use
those instructions.) . -Ronald Krutz The CISSP PREP Guide (gold edition) pg 254-255