So now you may well ask that if download managers can (simultaneously) download parts of a file and resume downloads too just like torrent clients can, why can't the former resume interrupted torrent downloads as well? Like I said at the beginning, theoretically they can but there are various problems involved. Torrent clients use .torrent files that store information about each file, including names and file sizes. More importantly, the piece size is known and the SHA-1 hash (something like a unique digital 'fingerprint') of each piece, as also an info hash of the info dictionary as a whole, is included in the .torrent file. Thus even if a torrent client is used to resume an interrupted download of a torrent it has previously never encountered, it can compare the expected hashes of each piece with the actual hashes of the data on disk to figure out which pieces fail the hash check and thus need to be re-downloaded.
Master and Commander downloads torrent
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