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。
That's because every device you add to your network has to be manually added to your ARP script or entered into each machine's ARP table.
那是因为你每加入一台设备到你的网络中都需要你手动地编写ARP脚本或输入每台设备的ARP映射表。
All network devices have an ARP table, a short-term memory of all the IP addresses and MAC addresses the device has already matched together.
所有的网络设备都有一个ARP映射表，就是内存里的一小段存储着目前该设备已经匹配的IP地址和MAC地址对。
When designing and implementing the ARP protocol in high-end routers, we must deal with three key issues: consistency of the ARP table, ARP access failure and ARP security.
在高性能路由器上设计与实现ARP协议时存在三个关键问题：ARP表的一致性、ARP表访问失效和ARP协议的安全。
It sends the print job to the correct device, and it also associates the printer's MAC address of 00:90:7f: 12: DE: 7f with the printer's IP address of 192.168.0.45 in its ARP table.
它现在能将这个打印任务发给正确的设备(打印机，译者注)，并且在它的ARP映射表里将打印机的MAC地址00：9 0：7F：12：DE：7f和它的IP地址192.168.0.45关联起来。
Your computer keeps this table for efficiency so that it doesn't have to keep broadcasting ARP requests to computers it has already queried.
你的计算机为了效率而维护这个映射表，这样它就不用不断广播ARP请求去询问它已经询问过的计算机了。
Your computer keeps this table for efficiency so that it doesn't have to keep broadcasting ARP requests to computers it has already queried.
你的计算机为了效率而维护这个映射表，这样它就不用不断广播ARP请求去询问它已经询问过的计算机了。
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