论文部分内容阅读
自九十年代Internet开放商用以来,联网主机逐年猛增。在短短的数年内演变成为全面商业化的全球信息网,给全球的联网用户在获取信息方面带来了极大的
Since the Internet opened up in the 1990s, the number of networked hosts has surged each year. In just a few years evolved into a fully commercial global information network to the world’s Internet users in access to information has brought a tremendous