Which of the following should MOST concern an IS auditor reviewing an intrusion detection system (IDS)?
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A. B. C. D.A.
An intrusion detection system (IDS) is an important security control that monitors network traffic for malicious activity and alerts security personnel when suspicious behavior is detected. When reviewing an IDS, an IS auditor should be most concerned about the number of false negatives. False negatives occur when the IDS fails to detect an actual attack or intrusion, which could result in significant damage to the organization's information assets.
While false positives and legitimate traffic blocked by the system are also important considerations, they are generally less concerning than false negatives. False positives occur when the IDS generates an alert for normal or benign activity, which can lead to alert fatigue and decreased effectiveness of the system. Legitimate traffic blocked by the system can result in disruptions to business operations, but this is usually less significant than the potential consequences of a successful attack.
Finally, the reliability of IDS logs is also an important consideration, as these logs are often used to investigate security incidents and support forensic analysis. If the IDS logs are inaccurate or incomplete, it could make it more difficult to identify and respond to security incidents effectively. However, this is generally considered less critical than ensuring that the IDS is detecting actual attacks and intrusions.
In summary, while all of these factors should be considered when reviewing an IDS, the number of false negatives should be the primary concern for an IS auditor.