The first receiving unit streams {HEAD ~ the content} to the second receiving unit through {TAIL ~ the network} 
through
The first receiving unit streams { HEAD ~ the content } to the second receiving unit through { TAIL ~ the network }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL