近几年来，Internet技术日趋成熟，已经开始了从以提供和保证网络联通性为主要目标的第一代Internet技术向以提供网络数据信息服务为特征的第二代Internet技术的过渡。-recent years, Internet technology matures. have started from and to provide network connectivity to ensure that the main aim of the first generation of Internet technology to provide network data information services to the characteristics of the second-generation Internet technology transition.