Each node has a specific naming convention to identify its role, our naming convention is pretty self explanatory, but here is a run-down of what each node does.
|This is a physical server, the root/parent/host server
|This is a virtual server, running the load-balancing software, caching proxy and distributed caching instance
|This is a virtual server, configured to deliver static and dynamic content
|This is a virtual server, configured to run the database and provides distributed caching instances
|This is a virtual server, acting as a relay host for all nodes; or outbound mail only
|This is a virtual server, to provide a root and non-privileged access environment for your use
|This is a virtual server, it is self-contained and provides health-check monitoring, performance graphing, GUI service restart and alerting, MageStack management