JNCIS-DC: Juniper Networks Certified Specialist – Data Center — Question 3
Which two statements are correct about the radio frequency rule of 10s and 3s? (Choose two.)
Answer options
- A. If the signal strength increases by 3 dB, the power is doubled.
- B. If the signal strength decreases by 10 dB, the power decreases tenfold.
- C. If the signal strength increases by 3 dB, the power is tripled.
- D. If the signal strength decreases by 10 dB, the power is halved.
Correct answer: A, B
Explanation
Statement A is correct because a 3 dB increase in signal strength indicates that the power has doubled. Statement B is also correct as a 10 dB decrease in signal strength means the power is reduced to one-tenth. Statements C and D are incorrect; C inaccurately states the power increases to three times, and D incorrectly suggests a halving of power for a 10 dB decrease.