Star topology , ring , tree and bus topology what their characteristics?
星形拓扑，环形，树形和总线拓扑各自的特点是什么？
Traditional DDN Private network belongs to star topology with shortcomings of difficult adjustment of logical topology and worse extendibility and maintainability of network.
传统DDN专网属于星型拓扑结构，缺点是逻辑拓扑难于调整、网络可扩展性和可维护性较差。
The paper analyzes the problems with AZL90 axle counter communication structure, and puts forward an idea for solving these problems with star topology.
本文分析了AZL90型计轴系统通信结构存在的不足，提出采用星型拓扑结构对其进行改进的一种思路。
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