Physical Security addresses actions you can take to protect buildings, property, and assets against intruders. When designing a physical security program, the three levels you need to protect are your outer perimeter, your inner perimeter, and your interior. If you can implement two or three forms of security at each level, then you will more than likely have an effective physical security system.

Outer Perimeter Security
The outer perimeter of your property is defined by your actual property lines. In securing the outer perimeter, your goal is to control who can walk or drive onto your property. One of the more extreme forms of perimeter security is a barbed wire fence with a gate protected by an armed guard. In other cases, a simple hedge may be sufficient. In deciding what type of perimeter security to implement, you need to weigh the risk of an intruder entering your property with the cost of the available physical security measures.