Service network layer: the service network USES the mature Ethernet switch redundancy technology, such as the stack or main standby mode.

业务网络层：业务网络采用成熟的以太网交换机冗余技术，比如堆叠或者主备模式。

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Now Ethernet is the main network technology used in Intranet, Ethernet switch is used to partition network segment and to make interconnection in network.

以太网是当前园区网所使用的主要网络技术，利用以太网交换机划分网段并实现网内互联。

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Based on the research of Ethernet security switch technology, we partitioned the security switch to several function modules, and implemented an Ethernet security switch prototype.

在前面研究了以太网安全交换技术的基础上，我们对安全交换机进行功能模块划分，实现了一个以太网安全交换的原型系统。

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