问题
单项选择题
It can merely extend transport media's length so that compensate for the attenuation of signals．It is
A．repeater
B．bridge
C．router
D．gateway
答案
参考答案：A
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It can merely extend transport media's length so that compensate for the attenuation of signals．It is
A．repeater
B．bridge
C．router
D．gateway
参考答案：A
