0037 TCP为什么必须三次握手? episode artwork

EPISODE · Jun 3, 2025 · 8 MIN

0037 TCP为什么必须三次握手?

from Web技术动态

来源讨论了TCP协议连接建立所需的三次握手,解释了TCP包中的重要控制位和序列号如何确保可靠的数据传输和连接状态管理。文章通过状态机图和实际抓包示例展示了三次握手的过程,并论证了为何至少需要三次握手才能充分验证双方的收发能力,从而有效防止旧的、延迟的数据包导致无效连接。文末引用了其他观点,提出了关于TCP连接建立本质的替代理论以及优化延迟和防止攻击的方法,如SYN Flood防御和Fast TCP/HTTP/3等。

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0037 TCP为什么必须三次握手?

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