Certified Ethical Hacker (CEH) — Question 80

Bluetooth uses which digital modulation technique to exchange information between paired devices?

Answer options

• A. PSK (phase-shift keying)
• B. FSK (frequency-shift keying)
• C. ASK (amplitude-shift keying)
• D. QAM (quadrature amplitude modulation)

Correct answer: A

Explanation

Bluetooth utilizes PSK (phase-shift keying) for its data transmission, which is effective for its low-power requirements. The other options, FSK, ASK, and QAM, are different modulation techniques that are not used in Bluetooth communications, making them incorrect choices.