The security kernel resides at ring 0, which is the most trusted protection ring level. Rings support system security by establishing different levels of privilege. The security kernel is not found at rings 1, 2, or 4.

1. The security kernel is found at what protection ring level?
A. Ring 0
B. Ring 1
C. Ring 2
D. Ring 4
Solution
A. Ring 0 is the most trusted ring. The security kernel resides at ring 0, and protection rings
support the security of the system. Answers B, C, and D are incorrect because the security kernel
is not located at the respective rings.