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传了 SYN，为什么还要传 ACK？

 2 years ago
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传了 SYN，为什么还要传 ACK？-吴师兄学编程
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双方通信无误必须是两者互相发送信息都无误。传了 SYN，证明发送方到接收方的通道没有问题，但是接收方到发送方的通道还需要 ACK 信号来进行验证。


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