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81.
Which are relative measures of RF power? (Choose two.)
- A.mW
- B.dB
- C.dBm
- D.dBi
- E.Watt
- Answer & Explanation
- Report
Answer : [B, D]
Explanation :
Explanation :
| dB and dBi are relative measures of RF power. mW, dBm, and watt are absolute measures of RF power. |
82.
In the 2.4 GHz range, what distance between the center frequencies (in megahertz) is
required for two channels to be considered nonoverlapping for HR/DSSS?
- A.5 MHz
- B.22 MHz
- C.25 MHz
- D.30 MHz
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| 25 MHz is required for channels to be considered nonoverlapping. 22 MHz is the width of a DSSS channel in the 2.4 GHz band. |
83.
Two characteristics of RF signals are:
- A.Amplitude
- B.Reflection
- C.Phase
- D.Refraction
- E.Diffraction
- Answer & Explanation
- Report
Answer : [A, C]
Explanation :
Explanation :
| Amplitude and phase are two characteristics of RF signals. Refl ection, refraction, and diffraction are behaviors of RF. |
84.
How many channels are available for wireless LANs to use in the unlicensed UNII-1 band?
- A.2
- B.4
- C.6
- D.11
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
| UNII-1 band has four channels available for wireless LAN use. Eleven channels are available in UNII-2e. |
85.
Which are absolute measures of RF power? (Choose two.)
- A.Watt
- B.dB
- C.mW
- D.dBi
- E.dBd
- Answer & Explanation
- Report
Answer : [A, C]
Explanation :
Explanation :
| Watt and mW are absolute measures of RF power. dB, dBi, and dBd are relative measures. |
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