which one of these barriers are most important

which one of these barriers are most important

Welcome to your first discussion. Before you start answering the discussion question please make sure you finish your reading assignments.

Chapters 4, 5 and 6 of our book covers approaches to security, protective and physical barriers. Your discussion subject of this week is to write an initial post on which one of these barriers are most important when it comes to securing a server room?

Please make sure you have an initial post (about 200 words)

please do it in APA format and references also