FIG 3 illustrates as an example a message sequence between a client 110, which is {HEAD ~ a browser}, and a server 300; {TAIL ~ this message sequence} relates to the third preferred embodiment of the invention 
FIG 3 illustrates as an example a message sequence between a client 110 , which is { HEAD ~ a browser } , and a server 300 ; { TAIL ~ this message sequence } relates to the third preferred embodiment of the invention
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH