{HEAD ~ The control portion} may also contain control parameters for each specific component along the transmit or receive {TAIL ~ path} to coordinate the processing of the packets 
receive
{ HEAD ~ The control portion } may also contain control parameters for each specific component along the transmit or receive { TAIL ~ path } to coordinate the processing of the packets
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH