Which one of the following is NOT a security mode of operation in an
information system?

A.
Contained

B.
System high

C.
Multilevel

D.
Dedicated

Explanation:
The correct answer is Contained, a distracter.
* In the system high mode the information system operates at the highest level of information
classification. In this mode, all users must have security clearances for the highest level of
classified information.
* Answer the dedicated mode requires that all users must have a clearance or an authorization
and a need-to-know for all information that is produced by the information system.
* The multi-level mode of operation, answer c, supports users with different clearances and data at
multiple classification levels.