单选题When comparing DSL broadband to cable broadband, which of the following is an advantage ofDSL broadband?（）AUpgraded copper lines allow maximum speed greater than cableBSignal is not shared back to the switchCSignal is shared back to the switchDDistance is not a factor in signal speed
单选题
When comparing DSL broadband to cable broadband, which of the following is an advantage ofDSL broadband?（）
A
Upgraded copper lines allow maximum speed greater than cable
B
Signal is not shared back to the switch
C
Signal is shared back to the switch
D
Distance is not a factor in signal speed
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