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