What is the main function of intrusion prevention systems (IPSs)?

What is the main function of intrusion prevention systems (IPSs)?

• A. Automatically respond to certain types of identified attack.
• B. Provide manual incident response only.
• C. Collect vulnerability data for patching.
• D. Monitor physical access to data centers.

Answer: (A)

The main function of intrusion prevention systems is to automatically respond to certain identified attacks by stopping or blocking malicious traffic in real time. Placed inline in the network path, an IPS analyzes traffic as it flows, recognizes attack patterns or anomalies, and can take actions such as dropping packets, resetting connections, or blocking sources to prevent the intrusion from reaching its target. This proactive, automated response is what sets an IPS apart from tools that only detect and alert. Manual incident response is not the primary function because the IPS automates mitigation rather than relying on human intervention. Collecting vulnerability data is more the role of vulnerability scanners and management processes, not the primary function of an IPS. Monitoring physical access concerns physical security, which is outside the scope of network-based intrusion prevention.

The main function of intrusion prevention systems is to automatically respond to certain identified attacks by stopping or blocking malicious traffic in real time. Placed inline in the network path, an IPS analyzes traffic as it flows, recognizes attack patterns or anomalies, and can take actions such as dropping packets, resetting connections, or blocking sources to prevent the intrusion from reaching its target. This proactive, automated response is what sets an IPS apart from tools that only detect and alert.

Manual incident response is not the primary function because the IPS automates mitigation rather than relying on human intervention. Collecting vulnerability data is more the role of vulnerability scanners and management processes, not the primary function of an IPS. Monitoring physical access concerns physical security, which is outside the scope of network-based intrusion prevention.