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      <title>TCP选择性确认如何解决累积确认无法处理的多包丢失困境</title>
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      <description>TCP选择性确认如何解决累积确认无法处理的多包丢失困境</description>
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      <title>TCP 三次握手与四次挥手：从 SYN 到 FIN 的状态机演进</title>
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      <description>深入解析 TCP 连接建立与终止的完整过程：从三次握手的序列号协商到四次挥手的状态流转，剖析 TIME_WAIT 存在的真正原因、SYN Flood 攻击原理，以及那些违背 RFC 规范的 Linux 实现。揭示为什么 TCP 状态机设计如此复杂，以及网络不可靠性如何深刻影响了协议设计。</description>
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