The second table is then cleared, and the hash values for {HEAD ~ the detected connections} in {TAIL ~ the next time period} are stored in the second table 
in
The second table is then cleared , and the hash values for { HEAD ~ the detected connections } in { TAIL ~ the next time period } are stored in the second table
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH