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IP协议负责管理Internet中的地址，进行路由选择以及将数据分片与重组。虽然目前支撑Internet运行的IPv４设计思想已经非常先进并且仍然适应当今的网络，但随着Internet的发展，除主机数量呈指数型增长外，手机、移动IP业务、PDA、有线电视机顶盒、网络家电以及其它尚未发明的
The IP protocol is responsible for managing the addresses in the Internet, routing and slicing and reassembling data. Although the current IPv4 design philosophy that supports Internet operation is very advanced and adapts to today’s networks, with the development of the Internet, in addition to the exponential growth of the number of hosts, mobile phones, mobile IP services, PDAs, cable set-top boxes, network appliances, Other not yet invented