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Which among the following is not a transmission medium?

  • A.telephone lines
  • B.coaxial cables
  • C.modem
  • D.microwave systems

Answer: C

Correct answer: modem

Telephone lines, coaxial cable and microwave systems all carry the signal, so each is a transmission medium. A modem is equipment at the end of the medium, converting the signal so it can travel.

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