RPC Stubs
Basically, a client-side stub is a procedure that looks to the client as if it were a callable server procedure.
A server-side stub looks to the server as if it�s a calling client.
The client program thinks it is calling the server; in fact, it�s calling the client stub.
The server program thinks it�s called by the client; in fact, it�s called by the server stub.
The stubs send messages to each other to make the RPC happen.