Network management protocol and the general model of network management have been analyzed. The centralized, hierarchical and distributed system structure of network management have been put forward.
分析了网络管理协议和网络管理的一般模型，给出了集中式、分层式和分布式三种网络管理体系结构。
This paper introduced the application of PLC in the centralized station of providing cold, among which control principle, structure of network and software are discussed.
本文介绍了PLC在地铁集中供冷站监控系统中的应用，主要阐述监控系统的控制原理、网络结构及软件结构。
Compared with a centralized structure, the distributed structure has several advantages including high speed, efficient usage of network bandwidth, less security problems, etc.
方案采用分布式的结构，具有速度快、网络带宽利用合理、安全性高等优势。提出了数据库小型化、本地化等设计原则。
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