本书从介绍IPv4中问题的产生和现状入手，详细阐述了IPv6的各个方面，包括IPv6的寻址结构、扩展头、身份验证和安全性、对任意点播和组播的支持以及对相关协议的影响，同时还探讨了IPv4向IPv6过渡的策略和应用。 本书内容由浅入深、语言精练易懂，为有经验的网络管理员和研究人员适应IP升级变化提供了关于IPv6清楚而又与众不同的介绍。 -This book describes IPv4 from the emergence and status of the question to start detailing the various aspects of IPv6, including IPv6, addressing the structure of extension headers, authentication and security, for any on-demand and multicast support, and the relevant protocols impact, and also discussed the IPv4 to IPv6 transition strategies and applications. The book Deep concise and understandable language for experienced network administrators and researchers to adapt to changes in IP upgrade provides a clear and distinctive about the introduction of IPv6.