A proxy is a computer in the network acting as a kind of clipboard for data transfer. Whenever you access the Internet from a company network and request a Web page that has already been read by a colleague, the proxy will be able to display the page much quicker, as long as it's still in the memory. All that needs to be checked in this case is that the page stored in the proxy is the latest version. If this is the case, the page won't have to be downloaded from the much slower Internet but can be loaded directly from the proxy.
代理服务器是网络上的一台计算机，用作数据传送的剪贴板。当您从一个公司网络访问 Internet 时，如果请求的 Web 页已经被其他同事读取，那么只要该页还在内存中，代理服务器就会以更快地速度显示该页。在这种情况中，只需要检查存储在代理服务器上的 Web 页是否是最新的版本。如果是最新版本，则无需从较慢的 Internet 上下载该页，而是直接从代理服务器装入。