The method includes receiving a request to transmit the file, via a streaming protocol allowing non sequential access, transmitting the advertising portion of the file, receiving a request to transmit {HEAD ~ a portion} of {TAIL ~ the requested portion} of the file prior to completing transmitting the advertising portion of the file, completing the transmission of the advertising portion of the file, and transmitting the requested portion of the file 
of
The method includes receiving a request to transmit the file , via a streaming protocol allowing non sequential access , transmitting the advertising portion of the file , receiving a request to transmit { HEAD ~ a portion } of { TAIL ~ the requested portion } of the file prior to completing transmitting the advertising portion of the file , completing the transmission of the advertising portion of the file , and transmitting the requested portion of the file
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