Theprimary function of a Network Intrusion Detection System (IDS)is toanalyze network trafficto detect potentially malicious activityby:
* Traffic Monitoring:Continuously examining inbound and outbound data packets.
* Signature and Anomaly Detection:Comparing packet data against known attack patterns or baselines.
* Alerting:Generating notifications when suspicious patterns are detected.
* Passive Monitoring:Unlike Intrusion Prevention Systems (IPS), IDS does not block or prevent traffic.
Other options analysis:
* A. Dropping traffic:Function of an IPS, not an IDS.
* C. Filtering traffic:Typically handled by firewalls, not IDS.
* D. Preventing execution:IDS does not actively block or mitigate threats.
CCOA Official Review Manual, 1st Edition References:
* Chapter 8: Network Monitoring and Intrusion Detection:Describes IDS functions and limitations.
* Chapter 7: Security Operations and Monitoring:Covers the role of IDS in network security.