Cisco Cyber Security Practice Exam

What is the primary role of an Intrusion Detection System (IDS)?

1. To block unauthorized access

2. To encrypt data

3. To monitor network activity

4. To manage user access

The correct answer is: To monitor network activity

The primary role of an Intrusion Detection System (IDS) is to monitor network activity. An IDS is designed to analyze network traffic for signs of suspicious or malicious behavior, alerting administrators when potential security threats are detected. This monitoring capability allows organizations to gain visibility into their network environment, identify potential attacks in real-time, and respond accordingly to investigate or mitigate any threats. By focusing on the analysis of traffic and system activities, an IDS plays a crucial role in enhancing an organization's security posture. It acts as an essential tool for threat detection rather than actively blocking access or managing user access, which are functions associated with other security measures, such as firewalls or access control systems. Additionally, while encryption protects data in transit or at rest, it is not the function of an IDS. Thus, the correct answer highlights the IDS's essential function within the broader context of network security.