One basic problem with a dead latch as a security device is that the overall length of the latch is not long enough to keep the door from being forced open by prying between the:

A miscellaneous opening that penetrates a perimeter must be protected and able to be locked when the cross-section area is at least:

In lens selection, the most important factor in determining the relative magnification of an object is the:

The planning phase of a physical protection system implementation produces which two of the following very important work products?

What are wide-beam units, primarily used to extend the illumination in long, horizontal strips to protect the approaches to the perimeter barrier?