The device {HEAD ~ packets} may include a header, a control portion and {TAIL ~ a data portion} 
include
The device { HEAD ~ packets } may include a header , a control portion and { TAIL ~ a data portion }
OTH OTH HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL