The new features added to the Sun RPC library and the advantage of these features are as follows:
One-way messaging—To reduce the time a client thread waits before continuing processing.
Non-blocking I/O—To enable a client to send requests without being blocked.
Client connection closure callback—To allow a server to detect client disconnection and to take corrective action.
Callback user file descriptor—To extend the RPC server to handle non-RPC descriptors.