显示ARP缓存信息.A R P高效运行的关键是由于每个主机上都有一个A R P高速缓存。这个高速缓存存放了最

近I n t e r n e t地址到硬件地址之间的映射记录。高速缓存中每一项的生存时间一般为2 0分钟，起

始时间从被创建时开始算起。-show ARP cache information. A R P efficient operation, the key is for each console has a high P A R speed cache. The cache storage of the recently I n e t t e r n address to the hardware address mapping records. Each cache of a general survival time of 2 minutes, starting from the time when the creation counted.