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Data transmission in the Internet network can be described as a self-adaptive system to the different congestion events that regularly occur at its numerous nodes. A connection, a TCP flow, in this network adapts its throughput according to the congestion it encounters on its path: Packets are sent as long as no loss is detected and throughput grows linearly during that time. On the contrary when a loss occurs, the throughput is sharply reduced by a multiplicative factor. This scheme is known as an Additive Increase and Multiplicative Decrease algorithm (AIMD).
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