Cisco CyberOps Associate (CBROPS) 200-201Security ConceptsMedium
A cybersecurity firm is developing a new intrusion detection system (IDS) that uses a database of known attack patterns to identify malicious network traffic. This IDS is designed to flag traffic only when it precisely matches an entry in its database. Which detection method is primarily being employed?
- AHeuristic Detection
- BBehavioral Detection
- CAnomaly-based Detection
- DSignature-based Detection
Show answer & explanationAnswer & explanation
Correct answer: D. Signature-based Detection
Signature-based detection systems rely on a database of known attack patterns or signatures. They flag traffic only when it exactly matches one of these pre-defined patterns. This method is effective against known threats but struggles with novel or zero-day attacks.
Why the other options are wrong
- A. Heuristic detection uses rules and algorithms to infer malicious activity, not strict pattern matching.
- B. Behavioral detection is a synonym for anomaly-based detection, focusing on deviations from normal patterns.
- C. Anomaly-based detection identifies deviations from a learned baseline of normal behavior.
Signature-based Detection
A method of intrusion detection that identifies threats by comparing observed data (e.g., network traffic, file hashes) against a database of known attack patterns or 'signatures'.
- Relies on a database of known attack patterns.
- Effective against previously identified threats.
- High accuracy for known attacks, low false positives.
- Ineffective against new or zero-day attacks.
- Requires frequent updates to the signature database.
Memory trick: IDS methods are like detectives: some look for exact fingerprints (signatures), others for unusual behavior (anomalies).