Intrusion Detection Systems for computers are important as they try to trace any intrusion to your PC through the Internet specifically. The various components of an IDS are Sensors, Console and Engine.
Sensors generate events, Console Monitors , Alerts and Controls the censors, The engine stores the details in a database and generates events according to security rules.
There are various types of IDS
1. Network IDS
2. Protocol Based IDS
3. Application Protocol Based IDS
4. Host Based IDS
5. Hybrid IDS
More on this in coming posts.