Question 370
An incident response engineer inspects the following evidence: A failed firewall is replaced under a new hardware serial and the SOC expects its replacement traffic to appear under the retired device without adjustment. What monitoring or governance control is most relevant to this weakness?
Explanation
Correct Answer
This safeguard directly addresses log device registration after rma: Include log source migration and historical identity continuity in the device replacement runbook. The risk being prevented is: The replacement is a separate physical source identity, so device authorization and inventory associations can require updating. A safeguard aimed at another fault would not control this issue.
Incorrect Answers
Existing historical logs are not necessarily re-evaluated against every later intelligence update without the relevant rescan workflow. “Review rescan schedules and retention windows so investigative coverage does not depend on one-time ingestion matching” would remedy that alternative situation, but it would not correct the present issue: the replacement is a separate physical source identity, so device authorization and inventory associations can require updating.
“Recalculate EPS capacity with every large source expansion and include burst headroom in sizing” is the supported response when the sustained events-per-second and storage/indexing demand can exceed the platform's supported sizing even when initial connectivity works. Here the decisive response is “Include log source migration and historical identity continuity in the device replacement runbook”, so that different intervention does not meet the stated requirement.
Retention and disk limits can constrain what logs can be stored or retained under high ingestion pressure. “Forecast ingestion rates and set escalating disk utilization alerts before critical thresholds” applies to that other condition. The reported evidence is a failed firewall is replaced under a new hardware serial and the SOC expects its replacement traffic to appear under the retired device without adjustment; this alternative would address the wrong dependency.