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