随着互联网的飞速发展 ,现行的Internet协议IPv4已难以适应网络发展的需要。介绍了IPv4协议的局限性和新一代网络协议IPv6的主要特点 ,论述了IPv6取代IPv4的必然性 ,以及通过IPv6 /IPv4双协议栈技术、隧道技术、地址和协议翻译器技术实现IPv4向IPv6无缝过渡的方法与策略 With the rapid development of the Internet, the current Internet Protocol IPv4 has been difficult to adapt to the needs of network development. This paper introduces the limitations of IPv4 protocol and the main features of IPv6, and expounds the inevitability of IPv6 in place of IPv4. It also makes it easy to implement IPv4 to IPv6 seamlessly through IPv6 / IPv4 dual stack technology, tunneling technology, address and protocol translator technology Methods and Strategies for Transition