Cisco ISE Deployment Terminology
The following terms are commonly used when discussing Cisco ISE deployment scenarios:
Service: A service is a specific feature that a persona provides, such as network access, profiler, posture, security group access, monitoring and troubleshooting, and so on.
Node: A node is an individual instance that runs the Cisco ISE software. Cisco ISE is available as an appliance and also as a software that can be run on VMware. Each instance (appliance or VMware) that runs the Cisco ISE software is called a node.
Persona: The persona of a node determines the services provided by the node. A Cisco ISE node can assume any of the following personas: Administration, Policy Service, Monitoring, and pxGrid. The menu options that are available through the Admin portal are dependent on the role and personas that a Cisco ISE node assumes.
Deployment Model: Determines if your deployment is distributed, standalone, or high availability in standalone, which is a basic two-node deployment.