What is the role of an IPS? to filter traffic based on Layer 7 information to enforce access control policies based on packet content to detect patterns of malicious traffic by the use of signature files to filter traffic based on defined rules and connection context

It's a system that monitors network traffic to prevent security threats or policy violations.

Explanation:

This system is designed to analyze the attack data and act accordingly by stopping it while the attack is brewing and before it is successful. This occurs immediately creating a series of blockages in the corporate firewall preventing the attack to be made.