initiating a download of a selected file segment of {TAIL ~ the suspect file} via {HEAD ~ a specific external identifier} on the file sharing network 
initiating a download of a selected file segment of { TAIL ~ the suspect file } via { HEAD ~ a specific external identifier } on the file sharing network
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH