The invention is directed to {TAIL ~ a method} of transmitting a file having an advertising portion and {HEAD ~ a requested portion} different from the advertising portion 
The invention is directed to { TAIL ~ a method } of transmitting a file having an advertising portion and { HEAD ~ a requested portion } different from the advertising portion
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH