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Chunks Peer Sending Bittorrent Tit For Tat Sends Check Seconds

Front BitTorrent: Sending Chunks
Back Tit-for-tat:
- Each peer sends chunks to the 4 peers currently sending him (check every 10 seconds) at the highest rate of chunks
- Other peers are "choked", do not get chunks
"Optimistically unchoke": Every 30 seconds, a peer is selected randomly and started to send this chunks
-> If connection is good, the peer can get into the top 4 list and thus a permanent exchange can be initiated.

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