Network Defense Essentials (NDE) 2025 – 400 Free Practice Questions to Pass the Exam

The approach known as misuse detection in Intrusion Detection Systems (IDS) relies on predefined patterns or signatures of known intrusions and is primarily focused on identifying attacks based on these established criteria. It does not actively create models of potential intrusions; rather, it recognizes specific attack patterns that have been documented.

On the other hand, heuristic detection is a method that relies on algorithms and rules to identify potential security threats based on characteristics and behaviors of network traffic, often drawing on experience and educated guesses. This method can adapt to recognize new variants of attacks but does not create models in the same way as behavioral detection.

Behavioral detection is actually the correct process for creating models of normal and abnormal activities by monitoring system or user behavior over time. This method establishes a baseline for normal operation and flags deviations from this baseline as potential intrusions. It can be particularly effective for discovering new or unknown attacks because it focuses on the behavior rather than specific signatures.

Therefore, while misuse detection is indeed a valuable intrusion detection technique focused on known attack signatures, behavioral detection specifically refers to the creation of models that can identify suspicious activities based on observed behavior patterns. This contextual understanding clarifies why behavioral detection is the method that captures suspicious activity through modeling.