A local host data processing system operating under the control of a local host operating system includes components of multiple emulating hosted operating systems. The host operating system further include a TCP/IP network protocol stack which couples to the communications facilities of the...http://www.google.com/patents/US5734865?utm_source=gb-gplus-sharePatent US5734865 - Virtual local area network well-known port routing mechanism for mult--emulators in an open system environment 
