What is intrusion detection?

Intrusion detection is the process of monitoring a network or systems for malicious activity or policy violations. An intrusion detection system (IDS) typically collects data from various sources, such as network traffic, system logs, and security alerts, and then analyzes this data to identify potential security threats. Common uses include identifying unauthorized access, malware infections, denial-of-service attacks, and data breaches. Detected intrusions are often reported to an administrator or security team for further investigation and response.