CISSP Practice question #221

What handles all access between objects and subjects in the computer kernel?
A: User mode.
B: Supervisor mode.
C: Reference monitor.
D: Superuser mode.

CBK 3: Security Engineering
Source: practice tests –


C: The Kernel At the core of the OS is the Kernel. At ring 0 (or 3), it interfaces between the operating system (and applications) and the hardware. Microkernels are modular kernels. The reference monitor is a core function of the kernel; it handles all access between subjects and objects. It is always on and can’t be bypassed.

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