What statement is true concerning the use of Orthogonal Frequency Division Multiplexing (OFDM) modulation method in IEEE 802.11 WLANs?
What statement is true concerning the use of Orthogonal Frequency Division Multiplexing (OFDM) modulation method in IEEE 802.11 WLANs?
Orthogonal Frequency Division Multiplexing (OFDM) was first introduced in the IEEE 802.11a standard and is utilized by Enhanced Rate PHY (ERP), High Throughput (HT), and Very High Throughput (VHT) PHYs. This means that OFDM is not limited to just 5 GHz transmissions but is also used in the 2.4 GHz band. These uses help achieve higher data rates and improve performance in IEEE 802.11 WLANs.
OFDM is only used in 5Ghz transmissions. 802.11g ERP-OFDM, and 802.11n HT-OFDM are used in 2.4Ghz transmissions and are not specifically OFDM.
Should be B. Because, n uses OFDM and n operates in both 5 and 2.4 GHz
ERP and HT both uses OFDM in 2.4Ghz . OFDM was introduced in 802.11a . Nearest correct answer is B.
Correct is B. ERP The Extended Rate PHY (ERP) was introduced to bring the OFDM modulation down into the 2.4 GHz band. The implemented PHY features in 802.11 devices use the same OFDM modulation used in 802.11a 5 GHz devices and use 20 MHz channels.