CWNP
CWNA-107 · Question #118
What statement is true concerning the use of Orthogonal Frequency Division Multiplexing (OFDM) modulation method in IEEE 802.11 WLANs?
The correct answer is D. OFDM modulation is used only in 5 GHz 802. 11 transmissions. See the full explanation below for the reasoning.
Question
What statement is true concerning the use of Orthogonal Frequency Division Multiplexing (OFDM) modulation method in IEEE 802.11 WLANs?
Options
- AOFDM was used by Frequency Hopping Spread Spectrum (FHSS) PHY devices.
- BOFDM was first introduced in 802. 11a and is used by the ERP, HT and VHT PHYs as well
- COFDM implements BPSK modulation to allow for data rates up to 7 Gbps.
- DOFDM modulation is used only in 5 GHz 802. 11 transmissions.
How the community answered
(23 responses)- A13% (3)
- B4% (1)
- C4% (1)
- D78% (18)
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