What does the term 'false positive' mean in the context of IDS alerts?

What does the term 'false positive' mean in the context of IDS alerts?

• A. An alert that indicates a threat when there is none.
• B. An alert that is always accurate.
• C. An alert that detects a threat only after it has occurred.
• D. An alert that blocks traffic without user confirmation.

Answer: (A)

In IDS alerts, a false positive happens when the system flags activity as malicious even though there is no actual threat. This means the alert is triggered for benign or legitimate behavior because it matches a rule, signature, or heuristic too broadly or due to a misconfiguration. Understanding this helps you grasp why alert volume can be high and why tuning rules is important to reduce unnecessary alerts. The best description is an alert that indicates a threat when there is none. The other options describe a true positive (an alert that is always accurate), a detection that happens only after the event (delayed or retrospective detection), or an automated blocking action, none of which define a false positive.

In IDS alerts, a false positive happens when the system flags activity as malicious even though there is no actual threat. This means the alert is triggered for benign or legitimate behavior because it matches a rule, signature, or heuristic too broadly or due to a misconfiguration. Understanding this helps you grasp why alert volume can be high and why tuning rules is important to reduce unnecessary alerts. The best description is an alert that indicates a threat when there is none. The other options describe a true positive (an alert that is always accurate), a detection that happens only after the event (delayed or retrospective detection), or an automated blocking action, none of which define a false positive.