On Top of which technology is Java RMI implemented?

Question

I am working on a little project and wondered, on top of which technology the communication in Java RMI is implemented. More Precisely: How are the "links" between the communicating RMI clients/Servers implemented? Do they use Sockets (TCP/UDP)?

Answer 1

All the RMI protocols (JRMP, IIOP, JERI, etc) are implemented over TCP sockets, and JRMP and JERI (at least) are also layered over Object Serialization.

Answer 2

Yes along with IIOP. You can find more info at

• http://docs.oracle.com/javase/6/docs/technotes/guides/rmi-iiop/index.html
• http://docs.oracle.com/javase/tutorial/networking/sockets/index.html