Which of the following rated systems of the Orange book has mandatory protection of the TCB? 

Answer options:

A. A-rated
B. B-rated
C. D-rated
D. C-rated

B

A B-rated system of the orange book has mandatory protection of the trusted computing base (TCB). Trusted computing base (TCB) refers to hardware, software, controls, and processes that cause a computer system or network to be devoid of malicious software or hardware. Maintaining the trusted computing base (TCB) is essential for security policy to be implemented successfully.