What is the primary purpose of intrusion detection?

The primary purpose of intrusion detection is to detect and respond to unauthorized actions and potential threats in real-time. Intrusion detection systems (IDS) monitor network traffic and system activities for any signs of malicious behavior or policy violations. By analyzing traffic patterns, logs, and other data sources, an IDS can identify potential security breaches, alert administrators, and provide forensic data to help understand the nature of the threat.

This capability is crucial for organizations that need to safeguard their networks and data from intrusions that could lead to data breaches, data loss, or system compromise. The real-time monitoring aspect allows for a quick reaction to potential threats, helping to mitigate damage before it escalates.

In contrast, the other options focus on different aspects of network security. Encrypting sensitive data is vital for protecting information during transmission or storage but is not related specifically to detecting intrusions. Conducting vulnerability scanning is about identifying weaknesses in systems before they can be exploited, which is a proactive measure, whereas intrusion detection is more about responding to exploits once they occur. Reducing server load during peak hours pertains to performance optimization rather than security measures directly related to detecting intrusions.