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Openai/692451a2-4ecc-800b-b601-8d7b09eea462
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===== 1. 父进程不关闭 connect_d，会让 TCP 连接的哪一端无法正常关闭？为什么？ ===== # 子进程不关闭 listener_d，会导致 accept 行为出现什么“混乱竞争”现象？ （这两个问题分别考察 TCP 四次挥手与进程文件描述符共享模型） 你任选一种角度（例如：引用计数、TCP 关闭状态、FD 表复制机制）来解释即可。
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