There is {HEAD ~ a plurality} of retransmit servers in {TAIL ~ the network buffering portions} of the packets they respectively receive during the session 
There is { HEAD ~ a plurality } of retransmit servers in { TAIL ~ the network buffering portions } of the packets they respectively receive during the session
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH