> For the complete documentation index, see [llms.txt](https://lfool.gitbook.io/computer-network/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://lfool.gitbook.io/computer-network/di-wu-zhang-chuan-shu-ceng.md).

# 第五章：传输层

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