In many ways, communications networks are like road systems: their purpose is to move traffic quickly from one place to another with minimum congesti… - James P. Hogan

" "

In many ways, communications networks are like road systems: their purpose is to move traffic quickly from one place to another with minimum congestion. They therefore present similar problems to their designers. Speed is important, of course, and so is safety, which means essentially the same in communications as it does on highways: what arrives at a destination should bear as close a resemblance as possible to whatever left the departure point.