互联网作为信息来源和电子商务平台在巨大成功的同时也伴随着严峻的挑战。其中日益凸显的一个问题就是站点访问速度和下载网页的时间不稳定,而且常常慢得令人无法忍受,难怪一些人将“www”戏称为“World Wide Wait”。运营商和服务提供商正投入巨资来提高互联网带宽。然而,仅仅依靠额外的带宽还不能解决网络等待时间的问题,或加快服务器的响应速度。因此,高速缓存便 The great success of the Internet as a source of information and e-commerce platform is accompanied by severe challenges. One of the more prominent issues is the speed of site visits and the downtime of downloaded pages, which are often too slow to tolerate. No wonder some people call “www” the “World Wide Wait.” Operators and service providers are investing heavily to increase Internet bandwidth. However, relying solely on extra bandwidth can not solve the problem of network latency or speed up the server’s response. Therefore, the cache will be