> 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-liu-zhang-ying-yong-ceng.md).

# 第六章：应用层

![](https://2396550738-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-M8zvqNNVZctOHx6v8No%2F-MET8lIM2ybpLqSjfMNd%2F-MET9dw89_EfM11FvtrI%2F%E5%BA%94%E7%94%A8%E5%B1%82.svg?alt=media\&token=df092eab-3437-461b-b2ef-3acdfe4e1feb)