What is the primary function of an intrusion detection system (IDS)?

The primary function of an intrusion detection system (IDS) is to monitor network traffic for suspicious activities. This system analyzes data packets moving through the network or examines logs to identify signs of unauthorized access, threats, or policy violations. By continuously checking for these anomalies, an IDS helps maintain the integrity and security of the network by alerting administrators to potential threats before they can escalate into serious incidents.

The importance of monitoring lies in the fact that many intrusions can happen without immediate detection, and early identification can lead to a quicker response, potentially minimizing damage. An IDS serves as a critical element in a comprehensive security strategy, complementing other security tools by providing visibility into what is happening on the network at all times.