Pphysical separation for security in a computing environment.

1. Give an example of the use of physical separation for security in a computing environment. 2. Give an example of the use of temporal separation for security in a computing environment. 3. Give an example of an object whose sensitivity may change during execution. 4. A directory is also an object to which access should be controlled. Why is it not appropriate to allow users to modify their own directories? 5. List two disadvantages of using physical separation in a computing system. List two disadvantages of using temporal separation in a computing system.