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Wi-Fi uses

  • A.optic fiber
  • B.phase line
  • C.radio-waves
  • D.sound-waves

Answer: C

Correct answer: radio-waves

Wi-Fi is radio: it transmits in the unlicensed 2.4 GHz and 5 GHz bands. Optical fibre and phone lines are wired media, and sound waves are not used for data networking.

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