Explain the Request/Response Interface  

Many issues are involved in providing a procedural interface for client functions to interact with server components. First off, since my example uses one function as a pathway, each specific request of the server must be made through arguments passed to the interface procedure called CSInterface(). 

Usually, the first argument to the procedure will tell the CSInterface() which server procedure is to be executed, and the CSInterface() code is to perform its duties accordingly.