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中继器是工作在____的设备。
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中继器是工作在____的设备。
A、物理层
B、数据链路层
C、网络层
D、传输层
时间:2021-09-06 20:56
关键词:
石家庄铁道大学
计算机基础知识
答案解析
A
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