{HEAD ~ The internal decision making engine} generates {TAIL ~ a forwarding port vector} and outputs the result for data forwarding purposes 
{ HEAD ~ The internal decision making engine } generates { TAIL ~ a forwarding port vector } and outputs the result for data forwarding purposes
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH