Which of the following is NOT a function of IPS policies?

The function of IPS (Intrusion Prevention System) policies primarily focuses on identifying and preventing security threats, rather than controlling network access based on user credentials. IPS policies are designed to detect and block exploits, malformed traffic, and other suspicious activities that could compromise network security.

Traffic filtering based on user credentials typically falls under the domain of access control mechanisms, such as firewalls or user authentication systems, rather than IPS. An IPS is concerned with monitoring network traffic for malicious patterns or behaviors and taking action, which may include blocking traffic, generating alerts, or logging events. Thus, focusing on preventing exploits, defending against malformed traffic, and providing traffic logging and alerts are aligned with the core functions of IPS, which is why the first option does not apply.