What characteristic is NOT typical of passive barrier systems?

The characteristic that is not typical of passive barrier systems is the requirement for minimal space. Passive barrier systems are designed to be substantial and provide a physical presence that deters unauthorized access. This often means they require a more significant footprint, which can include walls, fences, or other permanent structures that are installed for security purposes.

In contrast to what would be implied by requiring minimal space, passive barriers typically have considerable bulk or mass to effectively serve their function. They are also usually installed permanently to provide long-term protection and are constructed in a way that does not require heavy equipment for relocation, emphasizing their stability and the sustained security they offer. Thus, the nature of passive barrier systems inherently leads to the conclusion that they generally occupy more space rather than less.