Free PW0-105 Web TestEngine Demo

Q10 Single choice

What statement is true concerning the use of Orthogonal Frequency Division Multiplexing (OFDM) in IEEE 802.11 WLANs?

A
802.11a and 11n use six (6) "pilot" subcarriers as a reference for the receiver to detect frequency and phase shifts of the signal.
B
802.11a/g/n OFDM includes several combinations of modulation and coding to achieve data rates from
1-600 Mbps.
C
With 802.11a OFDM, 16-QAM provides either 48 or 54 Mbps data rates, depending upon coding rates.
D
802.11n HT-OFDM utilizes 256-QAM, which increases the data rate from 54 Mbps (with 64-QAM) up to
65 Mbps.
E
In 802.11a OFDM, forty-eight (48) subcarriers are used as parallel symbol transmission paths to carry data.

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