CompTIA Security+ Exam Prep

Answer: A - A system is operating in system high-security mode when all users have security clearance to access the information, but don’t necessarily need to know all the information processed on the system. This mode also requires all users to have the highest level of clearance required by any and all data on the system. However, even though a user has the necessary security level to access an object, the user may still be restricted if he does not need to know things pertaining to that specific object.