問題文
An engineer proposes to patch and reboot the controllers on a production line during business hours, as is done for office servers. Which concern specific to operational technology makes this unacceptable?
選択肢
- These controllers are always disconnected from any network.
- These controllers refuse any software update that is not signed by the plant operator, so patching is technically impossible.
- These controllers hold no data worth protecting, so the effort of patching them cannot be justified and the correct course of action is to leave them as they were installed and to rely entirely on physical access control instead.
- In these environments continuous operation is the primary requirement, so an interruption for maintenance is itself a loss and change windows are rare and tightly controlled.