Question 290
At Oceanview Payments, a team reports that it corrected the following problem affecting regulated payments and credentialed access: A collector receives flow summaries but sampling is so aggressive that short suspicious connections are missed. Which observation BEST verifies that the correction actually worked?
Explanation
Correct Answer
A short controlled test flow is represented and long-term exporter utilization stays acceptable. This is the decisive evidence for the original problem: A collector receives flow summaries but sampling is so aggressive that short suspicious connections are missed. It verifies that the intended corrective control—Tune sampling and flow export parameters against detection goals and collector capacity—works in the relevant environment; a completed change ticket alone would not prove the outcome at Oceanview Payments.
Incorrect Answers
Events from multiple devices order correctly within defined clock tolerance. This would be relevant evidence for a different failure: Several security devices record events with unrelated local clocks, preventing reliable timeline reconstruction, usually addressed by Synchronize clocks using authenticated NTP and capture normalized timestamps centrally. It does not demonstrate that the current problem at Oceanview Payments was resolved. The specific required evidence is: A short controlled test flow is represented and long-term exporter utilization stays acceptable.
Analysts retrieve an event chain by identity and time while unauthorized users are denied. This would be relevant evidence for a different failure: Network telemetry exports all events but has no retention, access control, or searchable context, usually addressed by Centralize logs with controlled schema, index, least-privilege access, and retention. It does not demonstrate that the current problem at Oceanview Payments was resolved. The specific required evidence is: A short controlled test flow is represented and long-term exporter utilization stays acceptable.
One actionable incident links the underlying repeated events without losing forensic details. This would be relevant evidence for a different failure: A SIEM correlation rule raises thousands of identical alerts for a single blocked scanner, usually addressed by Deduplicate and aggregate detections by entity and time while preserving raw evidence. It does not demonstrate that the current problem at Oceanview Payments was resolved. The specific required evidence is: A short controlled test flow is represented and long-term exporter utilization stays acceptable.