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2020-08-19: what mechanism does TCP ensure reliability?

2020-11-06 21:55:00 【Fuda Dajia architect's daily question】

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Fogo's answer 2020-08-19：

Fogo's pithy formula ： school (jiao) It is true that Xu Zhen has a long history （tcp Reliability assurance mechanism ： check 、 Serial number 、 confirm 、 Retransmission 、 congestion 、 Traffic 、 Connect ）
check ： Is the data correct .
Serial number ： Number the data seq.
confirm ：ACK.
Retransmission ： Timeout retransmission and redundancy ACK Retransmission .
Congestion control ： Slow start （ Slow start ）、 Congestion avoidance 、 Fast retransmission 、 Fast recovery .
flow control ： According to the ability of the receiver, the sending speed of the sender is determined .
Connect ： Three handshakes and four waves .

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