这似乎是Mac OS的功能。如果我尝试ping任何主机名，它将从该IP地址返回ping - 即使主机名是虚构的。我不知道为什么OS X会这样做。

This seems to be a 'feature' of Mac OS. If I attempt to ping any hostname it will return the ping from this IP address - even if the hostname is fictional. I do not know why OS X does this.