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Internet是信息社会信息高速公路的雏形，是当前网络建设和应用的热点。随着众多用户接入Internet,IP地址已成为日趋紧张的资源。此外。在新的环境下。用户要求Internet能够提供多媒体服务、更为灵活的路由策略、更加安全的保密措施、更加合理的计费模型、处理移动用户的能力及支持ATM技术的能力。目前正处于研究阶段的下一代IP技术——IPNG（IPNextGeneration）对这些问题作了探讨．制定了IP的新版本——IPV6。文章对有关IPNG、IPV6的技术细节作了详细的讨论。并探讨中国CERNET向下一代IP过渡的策略。
Internet is the embryonic form of information society information expressway, which is a hot spot of current network construction and application. As many users access the Internet, IP addresses have become increasingly tense resources. In addition. In the new environment. Users demand that the Internet provide multimedia services, more flexible routing strategies, safer security measures, more reasonable billing models, the ability to handle mobile users and the ability to support ATM technologies. These issues are explored by IPNext Generation (IPNG), the next-generation IP technology currently under research. Developed a new version of IP - IPV6. The article discusses the technical details about IPNG and IPV6 in detail. And discuss China’s CERNET transition strategy to the next generation of IP.