cnp3-ebook

principles/transport

Czech

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The receiver may adjust its advertised receive window based on its current memory consumption, but also to limit the bandwidth used by the sender. In practice, the receive buffer can also shrink as the application may not able to process the received data quickly enough. In this case, the receive buffer may be completely full and the advertised receive window may shrink to `0`. When the sender receives an acknowledgment with a receive window set to `0`, it is blocked until it receives an acknowledgment with a positive receive window. Unfortunately, as shown in the figure below, the loss of this acknowledgment could cause a deadlock as the sender waits for an acknowledgment while the receiver is waiting for a data segment.

6 years ago

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