# 三次握手四次挥手

![挥手：谁先发起断开谁是客户端](https://2457808883-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FRxJcEoJGnxpkBfWvFRPw%2Fuploads%2Fgit-blob-c604a54a0201d6601fdc892b4f3b166985a38b54%2F34.png?alt=media)

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