A control room handles operations for a hazardous chemical plant. Which access control practice most directly limits the risk that an unauthorized individual could manipulate safety-critical systems from inside the room?
- A.Posting the room's location on the public facility map
- B.Leaving the door propped open during shift changes for convenience
- C.Allowing visitors to badge in using a shared guest credential
- D.Multi-factor physical access with badge plus PIN and anti-tailgating measures
Why D is correct
Strong physical access control to the control room, including multi-factor entry and measures against tailgating, ensures only authorized and accountable personnel can reach safety-critical workstations. Shared credentials, propped doors, and convenience exceptions defeat these protections.
Know someone studying for OT Security Fundamentals? Send them this one.