If the timer expires before data in the segment is acknowledged, TCP assumes that the segment has lost or being damaged, and a retransmission is sent.
如果在报文段中的数据未确认之前定时器超时,TCP就认为该报文段已经丢失或出现损坏,从而重传这一报文段。
参考来源 - 置位法解决TCP重传二义性问题·2,447,543篇论文数据,部分数据来源于NoteExpress
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