Call Semantics

Call semantics has to do with what the client can assume about the execution of the remote procedure, in particular, how many times the procedure was executed. This is important in dealing with error conditions. The three alternatives are exactly once, at most once, and at least once. ONC+ provides at least once semantics. Procedures called remotely are idempotent: they should return the same result each time they are called, even if it is several times.