试题详情
- 单项选择题请参见图示。主机 A 和主机 B 尝试同时传输帧但发生了冲突。主机 D 何时才能传输?()
A、立即
B、发送堵塞信号后
C、主机 A 和主机 B 完成传输后
D、堵塞信号消除且回退延迟过期后
- A
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