Intrusion Detection

Guide to Intrusion Detection

Intrusion Detection is considered as an important aspect of physical security in CISSP.

Why is it important?
The method of intrusion detection is important because it is a proactive way to detect and respond to potential security breaches, protecting sensitive data and information systems from unauthorized access which may lead to significant losses.

What is it?
Intrusion Detection Systems (IDS) are designed to monitor and analyze system activities for malicious activities or policy violations.

How does it work?
The IDS typically functions by monitoring network traffic, identifying potential threats based on predefined rules or abnormal behavior, and then responding by logging the activity, notifying system administrators, or blocking the suspected source.

How to answer questions regarding Intrusion Detection in an exam?
For any questions related to Intrusion Detection in the exam, it is important to understand the role of IDS, its methods of detection (signature-based, anomaly-based) and the benefits it provides in securing an organization's data. Don't forget to include key points such as the rapid detection of security breaches and its preventive nature.

Exam Tips: Answering Questions on Intrusion Detection
Always read the question carefully to understand what is being asked. If it involves terms related to intrusion detection, make sure you know the definitions and how they fit into network security. Be aware of how an IDS system can prevent, detect, and respond to threats, and what difference it can make in the security of a system. Also, remember the differences between different types of IDS and how they operate.