单选题An administrator suspects that an incorrect POTS line is carrying the DSL signal. Which of thefollowing will help diagnose this issue?（）AMultimeterBToner probeCProtocol analyzerDButt set
单选题
An administrator suspects that an incorrect POTS line is carrying the DSL signal. Which of thefollowing will help diagnose this issue?（）
A
Multimeter
B
Toner probe
C
Protocol analyzer
D
Butt set
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