List three common physical security controls found in OT environments.

List three common physical security controls found in OT environments.

• A. Password-protected screens
• B. Magnetic door locks only
• C. Transparent walls
• D. Access-controlled enclosures, tamper-evident seals, and CCTV/physical surveillance

Answer: (D)

In OT environments, physical security focuses on preventing access to critical assets, detecting any tampering, and watching for activity around those assets. The best combination is access-controlled enclosures, tamper-evident seals, and CCTV/physical surveillance. Access-controlled enclosures restrict who can reach or interact with equipment, reducing the chance of unauthorized access. Tamper-evident seals provide a clear, visible indication if a cabinet or panel has been opened, helping to spot tampering during inspections or after incidents. CCTV or physical surveillance acts as a deterrent and a means to monitor and record activity around important assets for real-time awareness and post-incident investigations. Password-protected screens are important for safeguarding digital access but do not address the physical protection of equipment. Magnetic door locks cover only one physical mechanism and don’t include detection or monitoring. Transparent walls aren’t a standard or practical security control in OT settings.

In OT environments, physical security focuses on preventing access to critical assets, detecting any tampering, and watching for activity around those assets. The best combination is access-controlled enclosures, tamper-evident seals, and CCTV/physical surveillance. Access-controlled enclosures restrict who can reach or interact with equipment, reducing the chance of unauthorized access. Tamper-evident seals provide a clear, visible indication if a cabinet or panel has been opened, helping to spot tampering during inspections or after incidents. CCTV or physical surveillance acts as a deterrent and a means to monitor and record activity around important assets for real-time awareness and post-incident investigations.

Password-protected screens are important for safeguarding digital access but do not address the physical protection of equipment. Magnetic door locks cover only one physical mechanism and don’t include detection or monitoring. Transparent walls aren’t a standard or practical security control in OT settings.