What are the two types of Intrusion Detection Systems?

The two types of Intrusion Detection Systems (IDS) are classified as host-based and network-based, which is why this choice is the correct answer. Host-based IDS monitor and analyze the internals of a computing system rather than the network traffic. They are often installed on individual devices and focus on detecting potential malicious activity or policy violations on that host. By analyzing system logs, process activities, and file system integrity, host-based IDS provides insights into attacks that may not be detected by monitoring network traffic alone.

On the other hand, network-based IDS are designed to monitor network traffic for suspicious activity. They analyze data packets as they traverse the network, helping to identify attacks that target multiple hosts or systems all at once. These systems can also detect patterns indicative of known threats and are essential for detecting intrusions in real-time across different network segments.

The other options do not represent types of Intrusion Detection Systems. A firewall is a security system that controls incoming and outgoing network traffic based on predetermined security rules, while antivirus software is designed to detect and remove malicious software but does not function as an IDS. Endpoint and application, as well as web and data, refer to different security concepts and domains rather than classifications of IDS.