Which type of protective barriers is mentioned for perimeter boundaries?

The mention of poured concrete or hardened steel barriers as protective barriers for perimeter boundaries is significant due to their physical strength and durability. These materials provide a robust physical presence that can withstand a variety of threats, including deliberate attempts to breach the perimeter. Concrete barriers can be designed to resist impact and can be highly effective in securing sensitive facilities against unauthorized access. Similarly, hardened steel barriers offer excellent resistance against cutting, breaching, and other forms of attack, making them ideal for high-security environments.

When evaluating other types of barriers, while wooden fences and barbed wire can serve as deterrents and may be effective in certain contexts, they do not offer the same level of fortification against determined intruders. Electronic gates play an essential role in access control but rely on electronic systems that can be malfunctioned or bypassed. Thus, poured concrete and hardened steel barriers are recognized as superior options for creating a secure perimeter capable of providing a strong first line of defense against intrusion.