Technically, network switches operate at layer two (Data Link Layer) of the OSI model.

从技术上讲，网络交换机工作在OSI模型的第二层（数据链路层）。

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The book looks at the standards battle between the OSI Reference model and TCP/IP.

这本书立足于OSI参考模型和TCP / IP之间的标准之争。

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You have likely seen the OSI model many times, and in Figure 2 you will see the OSI model planted next to the model that is used by the OMG.

您也许已经多次见过OSI模型了，在图2中，您将看到OSI模型，旁边就是OMG所使用的模型。

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