Parking-meter controllers run embedded/RTOS software that is rarely patchable. Which primary techniques best compensate?
Select an answer to reveal the explanation.
Short Explanation
If you cannot patch the parking meters much, do not leave them on the open Internet with default passwords. Fence them off and watch the traffic—isolation and monitoring are your main tools when the firmware is stuck.
Full Explanation
Embedded and RTOS devices often have limited or delayed patchability, so compensating controls such as network isolation and continuous monitoring become primary defenses. Exposing meters to the Internet with weak credentials, ignoring them, or loading unvetted software increases risk. Compensating with isolation and monitoring matches Domain 4.1 constraints for embedded municipal devices.