High - speed , muti - services and economy have become the major issues of the future ip backbone technology as far as thes poiflt is concerned , thes paper explores layer 3 switdrig technology which separates control component and forward compontal in the traditional roulers . two forwarding al gori thms - - - - d ata - driven mo d el and top olo gy driven model are also compared , a next generation ip backbone echno l o gy - - - - multiproto co l label switching is developed , with its operation and its deployinent in traffic engineering , c1ass - ofservce and virtual private network 本文从未来ip骨干网技术所要求的高速化、多业务支持、经济性出发，介绍了在传统路由器基础上将控制部件和转发部件分离的第三层交换技术，比较了数据驱动模型和控制驱动(拓扑驱动)模型两种转发算法，并由此引出下一代ip骨干网络技术? ?多协议标记交换，阐述了其工作原理以及在流量工程、服务等级区分和虚拟专用网中的应用。
