By using the headers, streaming server 100 may operate to create {HEAD ~ a new virtual file} with advertising, or allow {TAIL ~ the advertising} to be skipped, depending on the time elapsed since it transmitted a multimedia file 
By using the headers , streaming server 100 may operate to create { HEAD ~ a new virtual file } with advertising , or allow { TAIL ~ the advertising } to be skipped , depending on the time elapsed since it transmitted a multimedia file
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH