Question

What is the best description of an execution domain?

A) memory space insulated from other running processes in a multiprocessing system
B) a communication channel between an application and the kernel in the TCB
C) components that fall outside the security perimeter of the TCB
D) an isolated area that is used by trusted processes when they are run in privileged state

Answer 1

An execution domain is an isolated area used by trusted processes in privileged state. It ensures restricted access to system resources and sensitive operations.

Step-by-step explanation:

The best description of an execution domain is an isolated area that is used by trusted processes when they are run in privileged state. This means that the execution domain provides a restricted environment for processes that have special privileges, such as accessing system resources or performing sensitive operations.

For example, in a multiprocessor system, each processor may have its own execution domain that isolates it from other running processes. This ensures that the processor can only execute trusted processes with the necessary privileges.

An execution domain is different from a communication channel, memory insulation, or components falling outside the security perimeter of the TCB. While these concepts are related to system security and communication, they do not capture the essence of what an execution domain is.