Question 720
At Brookside Manufacturing, the industrial security team is conducting a plant safety and IT security assessment under requirements for production continuity and controlled test windows. Following the approved correction, auditors require proof that: A smart meter remains deployed despite unsupported firmware and no asset record linking it to a maintenance owner. Which result BEST demonstrates successful remediation?
Explanation
Correct Answer
Every meter has a responsible owner and outdated units are isolated or replaced according to reviewed risk deadlines. The observable result demonstrates that the documented condition, A smart meter remains deployed despite unsupported firmware and no asset record linking it to a maintenance owner. has been addressed. The planned remediation is: Maintain lifecycle inventory, approved patch exceptions and a documented replacement or compensating-control plan. This is a stronger validation than a saved ticket or unverified claim by Brookside Manufacturing.
Incorrect Answers
Devices reject a tampered update image and a valid approved update completes successfully. That observation would verify another scenario: A sensor fleet lacks a secure firmware-update process and accepts update files from an unauthenticated network share. The corrective step for that other scenario is: Require signed firmware, verified update provenance and a tested recovery/rollback path. But Brookside Manufacturing is evaluating: A smart meter remains deployed despite unsupported firmware and no asset record linking it to a maintenance owner. The necessary outcome is: Every meter has a responsible owner and outdated units are isolated or replaced according to reviewed risk deadlines.
Revoking a single test device's token does not disconnect the rest of the authorized fleet. That observation would verify another scenario: A building automation system reuses the same cloud API token on hundreds of field devices and cannot revoke one compromised unit. The corrective step for that other scenario is: Issue scoped per-device credentials with rotation, inventory ownership and independent revocation. But Brookside Manufacturing is evaluating: A smart meter remains deployed despite unsupported firmware and no asset record linking it to a maintenance owner. The necessary outcome is: Every meter has a responsible owner and outdated units are isolated or replaced according to reviewed risk deadlines.
A tabletop proves the incident team can reduce network exposure without creating an uncontrolled physical safety hazard. That observation would verify another scenario: An OT incident response playbook calls for immediately shutting down a controller that regulates a safety-critical process. The corrective step for that other scenario is: Coordinate containment with the process owner and safety procedures, using staged isolation where appropriate. But Brookside Manufacturing is evaluating: A smart meter remains deployed despite unsupported firmware and no asset record linking it to a maintenance owner. The necessary outcome is: Every meter has a responsible owner and outdated units are isolated or replaced according to reviewed risk deadlines.