Optionally, {HEAD ~ a single source download} of {TAIL ~ sought digital content} is automatically scheduled to be performed immediately, or at a later time, following the confirmation that a distributor advertises availability of such content from an IP address 
of
Optionally , { HEAD ~ a single source download } of { TAIL ~ sought digital content } is automatically scheduled to be performed immediately , or at a later time , following the confirmation that a distributor advertises availability of such content from an IP address
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH