ClearPass is a network access control solution that provides device visibility, connection policy enforcement, and user login management. It uses fingerprinting to identify devices and their types, and an adaptive policy engine to enforce wired, wireless, and VPN policies based on the device and user. ClearPass integrates with other security and infrastructure solutions through exchanges and APIs to enable features like automated defense, service chaining, BYOD onboarding, and guest access management. It collects data from various sources to build user and device profiles for adaptive trust and security monitoring through real-time policy actions and integration with IntroSpect for user entity behavior analytics.