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Traditional network routing algorithms send data from the source to destination along a single path. The selected path may experience congestion due to other traffic, thereby reducing throughput. Multi-path routing divides the data along multiple paths, with the aim of increasing overall throughput. Due to the different latencies of using multiple paths, packets are received out-of-order at the destination, and thus require reordering. This problem can be overcome by placing a buffer at the destination node in order to synchronize the incoming packets across the multiple paths. However, this solution is not scalable, since using a single large buffer is impractical, and can be expensive.
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