If you see a high purge count, increase the size of the ARP table.
如果您发现较高的清除计数，那么可以增大arp表的大小。
If your host has communicated successfully with another host, it's likely that there is an entry in the ARP table.
如果您的主机曾经与另一个主机成功地通信，那么在arp表中很可能有相应的条目。
The ARP table ensures that the device doesn't have to repeat ARP Requests for devices it has already communicated with.
ARP映射表确保该设备不会向它已经通讯过的设备重复发送ARP请求。
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