How is Device Trust established in Cisco ISE?

Device Trust in Cisco Identity Services Engine (ISE) is established primarily through the process of verifying the security posture and compliance of devices attempting to connect to the network. This entails assessing the device's security attributes, such as whether it has up-to-date antivirus software, appropriate operating system patches, and other compliance requirements that align with the organization's security policies.

When devices connect to the network, Cisco ISE conducts a posture assessment and checks these parameters to determine if the devices meet the required standards for access. This assessment ensures that only devices that comply with security policies are granted full access to network resources, thus creating a trusted environment.

The other options, while they play roles in network security or user interaction, do not directly contribute to the establishment of Device Trust in the context of Cisco ISE. For instance, signing a user agreement may ensure that users acknowledge the terms of device usage but does not provide a technical verification of the device itself. Similarly, acquiring end-user feedback or employing biometric authentication may enhance security but do not form the core mechanism through which ISE establishes Trust based on device compliance and security posture.