RPC (Remote Procedure Call) is a protocol that allows a program to execute a subroutine on another computer, as if it were a local procedure call. RPC connectivity is essential for distributed systems, as it allows different parts of a system to communicate with each other, even if they are running on different machines.
There are many ways to check RPC connectivity, but the most common is to use a tool called an RPC ping. An RPC ping sends a request to a remote server, and waits for a response. If the response is received, then the RPC connection is considered to be active.