一、引言 基于TCP/IP协议簇的Internet在最近20年中得到了飞速的发展,Internet的影响力波及到了社会的各个角落,深刻地影响着人类社会的文明进程。目前Internet上正在广泛使用的正协议——IPv4产生于1974年,Internet经过近30年的发展,无论从规模、技术,还是用户的要求来说,IPv4已经越来越不能满足实际使用和进一步发展的要求。IPv4如今面临着如下的 I. INTRODUCTION The Internet based on the TCP / IP protocol cluster has been rapidly developed in the last 20 years. The influence of the Internet has spread to every corner of society and profoundly influenced the civilization process of human society. At present, IPv4 is being widely used in the Internet is the agreement - IPv4 was born in 1974, the Internet after nearly 30 years of development, both in terms of size, technology, or user requirements, IPv4 has been increasingly unable to meet the actual use and further development Request. IPv4 now faces the following