正常情况下，ARP报文中的源IP地址（sender IP address），源MAC地址（sender hardware address）就是发送ARP报文的网络设备的正确地址。
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The above scenario involving a requester-server channel works fine as long as the IP address of the sender system (192.168.1.1) is unchanged.
上述场景涉及到请求方-服务器通道，只要发送方系统的IP地址(192.168.1.1)不变，该通道就能工作正常。
In that case, even if the sender side has a static IP address, each ISP would assigning an IP address from a different domain.
在这种情况下，即使发送方有静态IP地址，每个ISP可能会从不同的域分配IP地址。
Now paste the IP address in this trace route tool and you should get a fairly good idea about the location of the email sender.
然后将ip粘贴到本路由跟踪工具，您应该可以大体知道邮件发送者所在地了。
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