Procedure model in Distributed systems D Fig 21.4 illustrates the model of execution used with rPcs DArequest sent from a client to a server corresponds to a call of a remote procedure and a response sent from a server back to a client corresponds to the execution of a return instruction16 Procedure Model in Distributed Systems Fig. 21.4 illustrates the model of execution used with RPCs A request sent from a client to a server corresponds to a call of a remote procedure, and a response sent from a server back to a client corresponds to the execution of a return instruction