Bulk data transfer

The invention claims a network data communication. Some embodiments comprise: Initial original source and the final aim is set between the network connection the network from the original source to the ultimate destination transmitting a block of data from the ultimate destination to the source request retransmission and lost blocks from source to the ultimate destination retransmission of lost blocks. These embodiments further include measuring of a retransmit request round trip time of the round trip time is designed according to the ultimate destination transmitting of a retransmit request the time from the original source retransmission after the final aim of the receiving time measurement and the round trip time as the network is connected to the minimal retransmit request time wherein the round-trip time includes at the original source and the final aim of the network connection and data processing in the delay.