Cisco Identity Services Engine (ISE) is a centralized access control and policy management solution that can automate secure access to network resources. It profiles users and devices, authenticates network access, enforces security policy, and shares contextual data across the IT infrastructure. ISE provides capabilities for guest access management, secure BYOD onboarding, network access control, software-defined segmentation with Cisco TrustSec, and visibility/context sharing through its pxGrid technology. It supports a wide range of use cases including guest access, BYOD, network access, device administration, and compliance.