Chapter VII for the system design document, give the design of network topology and the distribution of IP addresses;

第七章为系统设计文档，给出了本设计网络的拓扑图以及IP地址分布图；

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Document only significant design approaches that contribute to the overall quality attributes of the system.

请仅记录有助于提高系统整体质量的重要设计方法。

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Models are often used to gain a better understanding of how the system works or to document design decisions for the actual implementation.

模型经常用于更好地了解系统如何工作，或用于记录实际实现的设计决策。

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