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Exam (elaborations)

CWNA Questions and Correct Answers the Latest Update

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At which layers of the OSI model does 802.11 technology operate? Data Link and Physical Which Wi-Fi Alliance certification defines the mechanism for conserving battery life that is critical for handheld devices such as bar code scanners and VoWiFi phones? A. WPA2-Enterprise B. WPA2-Per...

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  • November 7, 2024
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CWNA Questions and Correct Answers
the Latest Update
At which layers of the OSI model does 802.11 technology operate?


✓ Data Link
✓ and
✓ Physical



Which Wi-Fi Alliance certification defines the mechanism for conserving battery

life that is critical for handheld devices such as bar code scanners and VoWiFi

phones?

A. WPA2-Enterprise

B. WPA2-Personal

C. WMM-PS

D. WMM-SA

E. CWG-RF


✓ WMM-PS



Which of these terms can best be used to compare the relationship between

two radio waves that share the same frequency?

A. Multipath

B. Multiplexing

C. Phase
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D. Spread spectrum


✓ Phase



A bridge transmits at 10 mW. The cable to the antenna produces a loss of 3 dB,

and the antenna produces a gain of 20 dBi. What is the EIRP?

A. 25 mW

B. 27 mW

C. 4 mW

D. 1,300 mW

E. 500 mW


✓ 500 mW

✓ 10/2=5
✓ 5x10x10=500



dBi is an expression of what type of measurement?

A. Access point gain

B. Received power

C. Transmitted power

D. Antenna gain

E. Effective output




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✓ Antenna gain



What are some possible effects of voltage standing wave ratio (VSWR)?

(Choose all that apply.)

A. Increased amplitude

B. Decreased signal strength

C. Transmitter failure

D. Erratic amplitude

E. Out-of-phase signals


✓ Decreased signal strength
✓ Transmitter failure
✓ Erratic amplitude



When installing a higher-gain omnidirectional antenna, which of the following

occurs? (Choose two.)

A. The horizontal coverage increases.

B. The horizontal coverage decreases.

C. The vertical coverage increases.

D. The vertical coverage decreases.


✓ The horizontal coverage increases.
✓ and
✓ The vertical coverage decreases.



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802.11ac VHT radios are backward compatible with which IEEE 802.11 radios?

A. 802.11 legacy (FHSS) radios

B. 802.11g (ERP) radios

C. 802.11 legacy (DSSS) radios

D. 802.11b (HR-DSSS) radios

E. 802.11a (OFDM) radios

F. 2.4 GHz 802.11n (HT) radios

G. 5 GHz 802.11n (HT) radios

H. None of the above


✓ 802.11a (OFDM) radios
✓ and
✓ 5 GHz 802.11n (HT) radios



Which IEEE 802.11 amendment specifies the use of up to eight spatial streams

of modulated data bits?

A. IEEE 802.11n

B. IEEE 802.11g

C. IEEE 802.11ac

D. IEEE 802.11s

E. IEEE 802.11w




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