Server Connectivity Rules
Windows applications speak to other applications on the network using Remote Procedure Calls (RPC).
If this functionality stops working, the associated applications stop working.
Server Connectivity Rules verify this important foundation is working properly.
Real World Example
You use a watchdog application that starts services on remote servers.
The watchdog communicates via the Service Control Manager RPC.
Verify the SCM is accessible in order to keep your watchdog fully functional.