What term describes a system that checks every packet entering the network for anomalies and incorrect data?

What term describes a system that checks every packet entering the network for anomalies and incorrect data?

• A. A Host-Based IDS (HIDS)
• B. Anomaly Detection
• C. Network-Based Intrusion Detection Systems (NIDS)
• D. Signature Recognition

Answer: (C)

This is about monitoring traffic at the network boundary. A Network-Based Intrusion Detection System is placed where traffic enters or travels across the network and analyzes the packets passing by. It checks headers and payloads for anomalies, protocol violations, or malformed data, and can also look for known attack patterns using signatures. This network-wide, passive inspection fits the description best because it focuses on the ingress and transit traffic rather than monitoring a single host. While anomaly detection is a method that a IDS might use and signature recognition is one technique for identifying threats, the system described by the scenario is best identified as a Network-Based Intrusion Detection System.

This is about monitoring traffic at the network boundary. A Network-Based Intrusion Detection System is placed where traffic enters or travels across the network and analyzes the packets passing by. It checks headers and payloads for anomalies, protocol violations, or malformed data, and can also look for known attack patterns using signatures. This network-wide, passive inspection fits the description best because it focuses on the ingress and transit traffic rather than monitoring a single host. While anomaly detection is a method that a IDS might use and signature recognition is one technique for identifying threats, the system described by the scenario is best identified as a Network-Based Intrusion Detection System.