Title: OSI Simulation Framework
This class represents a version of an "intelligent hub", which checks,
if frames on layer 2 are corrupt or not; in case of an invalid frame
the frame is simply dropped and not forwarded.
Copyright 2004, 2005 Michael Sonntag & Institute for Information Processing and Microprocessor Technology (FIM), Johannes-Kepler-University Linz, Altenbergerstr. 69, A-4040 Linz, Austria.