Which of the following describes the characteristics of passive barrier systems?

Passive barrier systems are characterized by their significant bulk or mass. These systems are designed to prevent unauthorized access or deter physical attacks without the need for active or electronic components. The substantial physical presence of these barriers, such as walls, fences, or bollards, provides a deterrent effect simply through their existence.

This mass makes them effective in protecting sensitive areas and serves as a physically imposing obstacle that cannot be easily circumvented. The presence of these barriers does not depend on operator intervention or electronic systems, which distinguishes them from active barriers that may require power or manual activation. The emphasis on mass reflects their primary function, which is to create a physical barrier that enhances security through its robust design.