acquiring {HEAD ~ the timestamp} from {TAIL ~ the table} using the sequence number of the TCP acknowledgement 
from
acquiring { HEAD ~ the timestamp } from { TAIL ~ the table } using the sequence number of the TCP acknowledgement
OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH