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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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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 cableB、Signal is not shared back to the switchC、Signal is shared back to the switchD、Distance is not a factor in signal speed
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单选题Which of the following broadband types can provide the MOST available bandwidth?（）A
DSLB
FiberC
SatelliteD
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单选题Which benefit does digital subscriber line (DSL) systems for broadband access provide to the user?（）A
Dedicated lines for high security data transferB
Data and audio signals that share the same communications infrastructureC
Secure access to company extranetD
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