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城域网中同时用的技术有ATM、网桥、路由、网关、交换、VLAN等等。由于各项网络技术都有各自的优点,又有自身的不足,网络的整体实现是靠多项网络技术的有机结合而成,当选中某项技术时,它的不足的一面也被引入进来。基于这一点,任何大型企业城域网络总不是十全十美,在应用增长到某种情况下,总会有可能出现某些问题。城域网规模较大,在网络出现故障或不正常的现象时,分析
MAN at the same time with the technology ATM, bridge, routing, gateway, switching, VLAN and so on. As each network technology has its own advantages, but also has its own shortcomings, the overall realization of the network is based on a combination of a number of network technologies, selected a technology, its shortcomings have also been introduced. Based on this, the metropolitan area network of any large-scale enterprise is not perfect at all, and some problems may always occur when the application grows to a certain situation. MAN large-scale, network failure or abnormal phenomenon, the analysis