In IPv 4 to IPV6 transition, due to IPv4

代码说明：

在 IPv 4向 IPV6过渡的时，由于以IPv4为基础的互联网己经相当的稳定， 网络中的IPV4主机不可能立刻全部都转变成IPv6，整个过渡需要一个比较漫长 的过程。在过渡期间，由于1入4和IPv6在很长一段时期内会共存，因此很有必 要解决U，4和IP、6之间相互通信的问题。 目前 Ip v4 八Pv6过渡技术13主要有3种方案:隧道技术、双协议栈技术和地 址协议转换(NA】’-PT)。-In IPv 4 to IPV6 transition, due to IPv4-based Internet has been quite stable, IPV4 network host can not be all at once into IPv6, the transition needs of a relatively long process. During the transition period, as a result of one into 4 and IPv6 in a very long period of time will co-exist, so it is necessary to solve U, 4, and IP, 6 between the issue of communication. Ip v4 8 Pv6 current transitional technology 13 mainly three kinds of programs: the tunnel technique, dual protocol stack technology and address of protocol conversion (NA]-PT).