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In the context of hierarchical protection domains, often used in Virtualization environments, which of the following privilege modes should not be used in Ring 0?
User mode
Supervisory mode
System mode
Privileged mode
Ring 0 has direct access to the most resources thus User mode isn't appropriate for direct hardware access, as it requires restrictions to limit access to resources.
Edit: Original question: "Which option would be an incorrect name for Ring 0, protection rings?" edited for clarity and context to more closely match how this would be presented on the CISSP exam.
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