What is the primary function of behavior-based NIDS/NIPS?

The primary function of behavior-based Network Intrusion Detection Systems (NIDS) and Network Intrusion Prevention Systems (NIPS) is to analyze network traffic and identify unusual patterns or anomalies that may indicate malicious activity. By matching traffic patterns against established norms and behaviors, these systems can detect deviations that might signify an attack or intrusion attempt. This approach is effective in identifying previously unknown threats, including zero-day vulnerabilities, by recognizing behavior that doesn't fit expected traffic profiles.

In contrast, translating HTTP requests pertains to the functioning of web proxies or gateways, which is unrelated to intrusion detection or prevention. Encrypting network traffic addresses confidentiality and data protection but does not relate to the detection of intrusions. While detecting zero-day vulnerabilities is crucial, behavior-based NIDS/NIPS primarily focus on recognizing anomalous behaviors rather than specific vulnerabilities. Hence, their core function revolves around monitoring and analyzing traffic patterns to identify potential threats proactively.