路由器在整个网络模型的网络层运行，比以太网高了一级。
Routers operate at the network layer in the network model, one step above Ethernet.
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）。
Technically, network switches operate at layer two (Data Link Layer) of the OSI model.
最著名的此类结构是OSI的7层网络模型[6]。
The most famous such architecture is the OSI's 7 layer network model [6].
最著名的此类结构是OSI的7层网络模型[6]。
The most famous such architecture is the OSI's 7 layer network model [6].
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