Implementations Prev Next Chapter 10. People don't usually see all the links. From each discipline, they stress the factor they have familiarity.
Network security says it's safer, layered security, hierarchy, etc.
Theoretic ppl says no much difference, or it is worse to have two different. Watch the interactions of your system to secure it. Human factor is greatly ignored. There was a recent relevant discussion on those two MS keys. We cannot draw the whole picture at once.