The routing data identifies one of the plurality of data ports through which {HEAD ~ the data frame} will exit {TAIL ~ the switching fabric} to reach the destination device 
exit
The routing data identifies one of the plurality of data ports through which { HEAD ~ the data frame } will exit { TAIL ~ the switching fabric } to reach the destination device
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH