目前可用的IPv4地址已经分配了70％左右，而且B类地址已经基本耗尽。而采用长度为128字节IP地址的IPv6协议，则彻底解决了IPv4地址不足的难题，并且在地址容量、安全性、网络管理、移动性以及服务质量等方面有明显的改进，IPv6也成为下一代互联网络协议采用的核心标准之一-Currently available IPv4 addresses have been allocated about 70 , and the Class B addresses have basically been exhausted. The use of a length of 128 bytes of IP addresses IPv6 protocol, then solve the problem of the shortage of IPv4 addresses, and address capacity, security, network management, mobility and quality of service, etc. There is a noticeable improvement, IPv6 has also become the next generation of Internet protocol used by one of the core standards