> For the complete documentation index, see [llms.txt](https://huataihuang.gitbook.io/cloud-atlas-draft/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://huataihuang.gitbook.io/cloud-atlas-draft/os/linux/network/protocol/arp.md).

# ARP

ARP协议是二层交换网络的基础协议，很多局域网问题和ARP相关，在故障排查中需要具体分析。