Ids — CompTIA Security+ (SY0-701) Practice Questions

An intrusion detection system (IDS) is a security tool that monitors network traffic or host activity for signs of malicious behavior or policy violations and generates alerts when suspicious patterns are detected. CompTIA Security+ (SY0-701) tests candidates on the distinction between network-based IDS (NIDS) and host-based IDS (HIDS), as well as the difference between signature-based detection, which matches known attack patterns, and anomaly-based detection, which flags deviations from a baseline. A key exam concept is that an IDS is a passive monitoring tool that alerts but does not block traffic, differentiating it from an intrusion prevention system (IPS). Candidates are also expected to understand the concepts of false positives and false negatives and how they affect the operational usefulness of an IDS.

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