Certified Information Systems Security Professional (CISSP) — Question 383

Which part of an operating system (OS) is responsible for providing security interfaces among the hardware, OS, and other parts of the computing system?

Answer options

• A. Reference monitor
• B. Trusted Computing Base (TCB)
• C. Time separation
• D. Security kernel

Correct answer: D

Explanation

The security kernel is the main component that enforces security policies and controls access to system resources. The Reference monitor is a conceptual model, while the Trusted Computing Base (TCB) includes the security kernel but also encompasses other elements. Time separation is not directly related to security interfaces.