A receiving host computes the checksum on a frame and determines that the frame is damaged.The frame is then discarded.At which

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问题 A receiving host computes the checksum on a frame and        determines that the frame is damaged.The frame is then discarded.At which OSI layer did this happen?

选项 A、        session
B、        network
C、        physical
D、        data link
E、        transport

答案D

解析 帧的处理是在二层
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