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交换作为计算机网络技术发展的方向已经得到了越来越普遍的认可和重视，从各种局域网／城域网交换技术到广域的ＡＴＭ技术，正在或开始获得日益广泛深入的应用，路由技术作为相对成熟的网络技术，仍然是交换网络不可缺少的重要组成部分，对交换网络中的路由技术进行研究是必要和有益的。文章对交换网络的三种路由技术作了介绍，最后讨论了网络升级时交换网络与ＡＴＭ主干的连接问题。
As the direction of the development of computer network technology, exchange has gained more and more universal recognition and attention. From a variety of LAN / MAN switching technologies to a wide area of ATM technology, the access to or access to an increasingly widespread application of routing technology as a Relatively mature network technology is still an indispensable part of the exchange network. It is necessary and beneficial to study the routing technology in the exchange network. The article introduces the three routing technologies for switching networks. Finally, it discusses the connection between switching networks and ATM backbones during network upgrades.