Upon receiving of a request for establishing {HEAD ~ communication} between {TAIL ~ two initiating hosts}, retrieving means is used for obtaining all information for establishing of a successful communication from said port sharing table 
between
Upon receiving of a request for establishing { HEAD ~ communication } between { TAIL ~ two initiating hosts } , retrieving means is used for obtaining all information for establishing of a successful communication from said port sharing table
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH