In Cisco SD-Access, what role does the Identity Services Engine perform?

The Cisco Identity Services Engine (ISE) is crucial in SD-Access for dynamic endpoint-to-group mapping and policy definition. It acts as the policy enforcement point, authenticating users and devices, authorizing their access based on defined policies, and dynamically assigning them to specific scalable groups (SGTs). This allows for granular, identity-based access control. The other options are incorrect because: "Provides GUI management and abstraction via apps that share context" describes the Cisco DNA Center, which is the centralized management platform for SD-Access. "Analyzes endpoint-to-application flows and monitors fabric status" relates to the assurance and analytics capabilities, also primarily provided by Cisco DNA Center. "Manages the LISP EID database" is the function of the LISP Map-Server and Map-Resolver, which are core components of the SD-Access control plane.