If the destination IP address is local,the router searches an internal store of IP addresses and local-device media access control addresses.This store is known as the Address Resolution Protocol (ARP) cache.

• 如果目的IP地址为本地的，该路由器就搜寻存储着IP地址和本地设备介质访问控制（MAC）地址的内部存储器，这个存储器叫作地址分辨协议（ARP）高速缓存。