Which security measure is associated with causing delays in unauthorized access?

Active and passive security measures are crucial in preventing unauthorized access and can lead to delays in an intruder's attempts. Active measures involve actions taken to deter or respond to threats, such as surveillance systems, alarms, and physical barriers that actively engage with potential threats. Passive measures, on the other hand, include architectural designs, barriers, and environmental controls that reduce the opportunity for unauthorized access without a direct intervention.

When combined, these measures create multiple layers of security that not only deter potential intruders but also slow down their progress if they attempt to breach a facility. For example, a security fence (passive) combined with motion detectors (active) can significantly delay unauthorized individuals, allowing security personnel to respond more effectively.

The other options, such as routine inspections, training and drills, or increased security personnel, while important for overall security, focus on different aspects of security operations. Routine inspections can help discover vulnerabilities, training prepares personnel for responding to incidents, and increased personnel provides a physical presence and monitoring capability but may not directly cause delays for someone trying to gain unauthorized access like the combination of active and passive measures does.