What is a primary function of a Network IDS?

A primary function of a Network Intrusion Detection System (IDS) is to analyze traffic based on known signatures. This involves monitoring network traffic for suspicious activity and potential threats by comparing incoming data packets to a database of known threat signatures. When a match is identified, the IDS generates an alert for further investigation, helping organizations detect unauthorized access or anomalies in their network.

This capability is crucial for identifying both known and potential threats in real-time, allowing security professionals to respond effectively to mitigate risks and secure the network environment. The reliance on signature-based detection enables the IDS to filter through large volumes of traffic and spot malicious activity that aligns with previously identified attack patterns. This makes it a vital component in the broader cybersecurity strategy of a network.

In contrast, the other options do not align with the core functions of a Network IDS. While managing user authentication and serving as a web proxy are important security functions, they are typically associated with different types of security devices or systems, such as firewalls and authentication servers, rather than an IDS. Executing network transactions is related to network operation rather than monitoring and detecting security incidents.