The security kernel is found at what protection ring level A

The security kernel is found at what protection ring level?

A. Ring 0

B. Ring 1

C. Ring 2

D. Ring 4

Solution

Answer: Ring 0

Ring 0 - Kernel Level
Kernels work in Ring 0 (\"Supervisor Mode\")
Our Kernel provides the abstraction between Device Drivers and Applications software, and the firmware that the hardware uses.

Device Drivers work in Rings 1 and 2, as they require direct access to hardware devices
Normal application software work in Ring 3 (\"User Mode\")