# 网络状态实验室

> 从 DNS 到浏览器，按连接层定位通用网络故障，并用可回退的步骤验证恢复。

Source classification: REBUILT_VERIFIED_REPLACEMENT
Canonical: https://sansui-r.com

## Main sections
- [诊断路径](https://sansui-r.com/diagnosis/)
- [DNS](https://sansui-r.com/dns/)
- [传输层](https://sansui-r.com/transport/)
- [Web 握手](https://sansui-r.com/web/)
- [浏览器](https://sansui-r.com/browser/)
- [本地网络](https://sansui-r.com/local-network/)
- [本地工具](https://sansui-r.com/tools/)
- [搜索](https://sansui-r.com/search/)

## Evidence policy
Observations are separated from hypotheses. No local example is presented as a fleet-wide or external benchmark.