Alaska Security Guard Certification Practice

A common physical access control method employed on a building is through the use of doors and mechanical locks, also known as physical locking systems. This means that individuals must possess a key or use a combination code to unlock the door and gain entry. Option B, which includes gates, barricades or fences, may also be used for buildings that have a larger perimeter to secure, such as warehouses or factories, but typically not for smaller buildings. Option C, a guard dog, is not a typical access control method as it can pose a safety risk and is not always reliable. Option D, an alarm system, is not a physical access control method as it does not prevent unauthorized entry, but rather alerts authorities after a breach has already occurred. Therefore, option A is the most common and effective physical access control method employed on a building.