💡 1. A. Motion detectors – ᤶ ᤷ Less effective as a preventive control o Motion detectors are typically used for intrusion detection and serve as a reactive control to alert security when unauthorized movement is detected. o However, they do not prevent access in the first place. 2. B. Key card access to the facility – ࿨ ࿩ ࿪ Correct Answer o Key card access is a strong preventive control because it ensures that only authorized personnel can physically access the data center. o It is a proactive control that prevents unauthorized individuals from entering the facility, thus protecting sensitive equipment and data from unauthorized access. 3. C. Security cameras – ᤶ ᤷ Not a preventive control o Security cameras are primarily monitoring tools used for detection and evidence gathering after an event occurs. o While they provide valuable insights for post- event investigation, they are not effective in preventing unauthorized access on their own. 4. D. Monitoring access to data center workstations – ᤶ ᤷ Detection, not prevention o Monitoring access to workstations is an important detection control, but it doesn’t prevent unauthorized physical access to the data center itself. o Preventive controls focus on stopping access before it happens, and workstation monitoring is more about logging user activity after access is granted.