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

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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