Which of the following is considered the totality of protect

Which of the following is considered the totality of protection mechanisms within a computer system and is responsible for enforcing security?

A. Rings of protection

B. The security kernel

C. TCB

D. Resource isolation

Solution

C. The Trusted Computer Base (TCB) is the totality of protection mechanisms within a computer system. This includes hardware, firmware, software, processes, and some inter-process communications. These items are responsible for enforcing security. Answer A is incorrect because rings of protection are designed to protect the operating system. Answer B is incorrect because the security kernel is the most trusted portion of the operating system. Answer D is incorrect because although resource isolation is an important part of implementing security, it is not the totality of protection mechanisms.