Question 250
At Elmwood Manufacturing, a team reports that it corrected the following problem affecting industrial analytics and business systems: A security team places a passive IDS at the edge and expects it to interrupt malicious packets. Which observation BEST verifies that the correction actually worked?
Explanation
Correct Answer
A simulated exploit is stopped by the inline path and creates a corresponding incident. This is the decisive evidence for the original problem: A security team places a passive IDS at the edge and expects it to interrupt malicious packets. It verifies that the intended corrective control—Use an inline IPS when active blocking is required or keep IDS strictly for alerting—works in the relevant environment; a completed change ticket alone would not prove the outcome at Elmwood Manufacturing.
Incorrect Answers
A benign permitted session passes while a test signature is identified and blocked. This would be relevant evidence for a different failure: A data-center border uses only stateless filtering and cannot detect known exploit payloads in permitted sessions, usually addressed by Deploy an inline next-generation intrusion prevention capability with appropriate inspection and tuning. It does not demonstrate that the current problem at Elmwood Manufacturing was resolved. The specific required evidence is: A simulated exploit is stopped by the inline path and creates a corresponding incident.
Bidirectional flows remain established across failover without bypassing enforcement. This would be relevant evidence for a different failure: Traffic inspection fails on a cluster because asymmetric routing sends response packets through a different stateful node, usually addressed by Correct routing or session-state synchronization to maintain symmetric flow inspection. It does not demonstrate that the current problem at Elmwood Manufacturing was resolved. The specific required evidence is: A simulated exploit is stopped by the inline path and creates a corresponding incident.
Each branch enforces local policy while the manager reports synchronized deployment status. This would be relevant evidence for a different failure: An enterprise needs firewall control at every branch but centralized policy visibility across dozens of devices, usually addressed by Choose distributed firewall enforcement with a centralized multidevice policy manager. It does not demonstrate that the current problem at Elmwood Manufacturing was resolved. The specific required evidence is: A simulated exploit is stopped by the inline path and creates a corresponding incident.