New Mexico Security Guard Practice Exam

Lock and key is the correct answer because it is the most commonly used form of physical access control. Physical access control is about restricting or allowing access to physical spaces. A lock and key system provides a simple and efficient way to control who has access to a particular location. It allows only individuals with the correct key to access a locked space, thus preventing unauthorized entry. The lock and key system is a very old, established method for controlling access and it is still in widespread use today in many contexts, including homes, offices, and commercial spaces. Its popularity is due to its simplicity, reliability, and cost-effectiveness compared to more complex and expensive access control systems.