To avoid unnecessary complexity in the marking environment certain restrictions are placed on solutions that use RMI. Specifically:
You must not require the use of an HTTP server.
You must not require the installation of a security manager.
You must provide all classes pre-installed so that no dynamic class downloading occurs.
You must use RMI over JRMP (do not use IIOP)
That's a very, very old topic. I challenge you to find a similar one from 2008-2009 onwards