The boundary separating the TCB from the remainder of the system is called the:

The boundary separating the TCB from the remainder of the system is
called the:

A.
Star property.

B.
Discretionary control boundary.

C.
Security perimeter.

D.
Simple security property.

Explanation:
The correct answer is Security perimeter. Answers Star property and Simple security property deal
with security models and answer Discretionary control boundary is a distracter.