According to the present invention, when a currently connected host and a host that should be connected next are {HEAD ~ the same, wasteful processing} in {TAIL ~ which disconnection} from and reconnection to the same host can be averted 
According to the present invention , when a currently connected host and a host that should be connected next are { HEAD ~ the same , wasteful processing } in { TAIL ~ which disconnection } from and reconnection to the same host can be averted
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH