Which of the following statements about protective barriers is correct?

Protective barriers play a crucial role in enhancing physical security measures around a facility. When the correct statement highlights that they can enforce facility access control, it emphasizes their function in restricting unauthorized entry and helping to maintain secure perimeters. By implementing barriers such as fences, walls, or bollards, an organization can effectively control who can access specific areas, thus contributing significantly to the overall security strategy.

These barriers serve as a physical deterrent to intruders, protect assets, and define secure zones within a facility. Their ability to enforce access control is essential within security protocols, as they can be complemented by additional measures such as security personnel, surveillance systems, and access control technologies.

The other options misrepresent the role and capabilities of protective barriers, as barriers are not merely decorative, nor are they limited to hard types. They can include soft barriers, such as landscape designs or signage, that still provide a level of security. Additionally, the assertion that they serve no purpose contradicts their established role in the comprehensive security framework of facilities.