Which of the following statements is TRUE of digital subscriber line signals?
A. Digital subscriber line signal data transmission and telephone conversations cannot occur simultaneously.
B. Digital subscriber line signals use the same protocols as cable modems for data transmission.
C. Digital subscriber lines use single-mode optical fiber only.
D. Digital subscriber line signals do not interfere with telephone signals.
E. Digital subscriber line signals replace phone signals and are sent to the ISP.
Answer: D
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