Protocol Anomaly Detection models are built on TCP/IP protocols using their specs?

Protocol Anomaly Detection models are built on TCP/IP protocols using their specs?

• A. Signature Recognition
• B. Anomaly Detection
• C. Protocol Anomaly Detection
• D. SIV

Answer: (C)

Protocol Anomaly Detection focuses on how a protocol should behave according to TCP/IP specifications. It builds models of the protocol’s state machines, valid message sequences, header field rules, and timing expectations, then monitors traffic to ensure every packet and flow conforms to those rules. When a packet arrives out of order, uses illegal flag combinations, contains inconsistent fragments, or otherwise violates the protocol semantics, it’s flagged as anomalous. This makes it the best fit for detecting issues that arise from protocol misuse or evasion, not just from matching known patterns or spotting generic unusual activity. Signature recognition relies on known attack patterns, so it can miss new or obfuscated exploits. General anomaly detection looks for unusual behavior but doesn’t inherently enforce protocol rules. SIV isn’t applicable to this context.

Protocol Anomaly Detection focuses on how a protocol should behave according to TCP/IP specifications. It builds models of the protocol’s state machines, valid message sequences, header field rules, and timing expectations, then monitors traffic to ensure every packet and flow conforms to those rules. When a packet arrives out of order, uses illegal flag combinations, contains inconsistent fragments, or otherwise violates the protocol semantics, it’s flagged as anomalous. This makes it the best fit for detecting issues that arise from protocol misuse or evasion, not just from matching known patterns or spotting generic unusual activity.

Signature recognition relies on known attack patterns, so it can miss new or obfuscated exploits. General anomaly detection looks for unusual behavior but doesn’t inherently enforce protocol rules. SIV isn’t applicable to this context.