Posture is a feature within Cisco ISE that verifies the compliance of an endpoint before providing access to the network. Posture assessment checks the state of the endpoint, such as the operating system, antivirus, firewall, patches, and so on, against the predefined policies. If the endpoint does not meet the policy requirements, it can be remediated by installing or updating the necessary software or configuration. Posture assessment can be done for both wired and wireless endpoints, as well as VPN clients. Posture assessment requires the installation of a posture agent on the endpoint, which communicates with the posture service on the ISE server. The posture agent can be either a persistent agent, which runs in the background and provides continuous assessment, or a temporal agent, which runs on-demand and is removed after the assessment is complete. Posture assessment can be integrated with 802.1X or web authentication methods for network access control. References :=
Some possible references are:
ISE Posture Prescriptive Deployment Guide
ISE Posture Deployment Best Practices and Considerations
Understanding ISE Posture Services
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