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 or personas of a node determine the services provided by a 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 an 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.