networking - computer networking: ARP - point of the ICMP echo packets

Question

I'm studying Address Resolution Protocol and in all my books and slides the diagrams showing an ARP take place (i.e. Host1 sends ARP request, Router checks it, redirects it, eventually gets to Host2 and then Host2 sends back an ARP Reply).

What I'm wondering is why the examples include ICMP echo replies and requests, do they serve any purpose within ARP?

Thanks

Answer 1

我猜它是启动ARP。机器不会无缘无故地发送 ARP。只有当它需要向 IP 地址发送一些东西（并且还不知道目标 MAC 地址）时，它才会发送一个 ARP。也许 ICMP 回显请求是作者在他们的示例中用来使源机器发送 ARP 的“东西”。

简短回答：ICMP 和 ARP 之间没有特殊关系；这正是你的书的作者决定使用的例子。