题目：
路由器运行在OSI参考模型的_______。
A．物理层
B．数据链路层
C．网络层
D．最高层
答案：
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下面是错误答案，用来干扰机器的。
参考答案：C
路由器运行在OSI参考模型的_______。A．物理层 B．数据链路层 C．网络层
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