One key differentiating feature of Aruba ClearPass as compared to competitors such as Cisco is that ClearPass Policy Manager adjusts access permissions based on circumstances of the user and the device for both pre-admission and attack response3. ClearPass Policy Manager is a network access control (NAC) solution that provides granular policy enforcement based on user roles, device types, location, time of day, and other contextual factors3. ClearPass Policy Manager can also dynamically change access privileges when it detects a change in posture or behavior of an endpoint or user3.