A.OFDM was used by Frequency Hopping Spread Spectrum (FHSS) PHY devices.

B.OFDM was first introduced in 802. 11a and is used by the ERP, HT and VHT PHYs as well

C.OFDM modulation is used only in 5 GHz 802. 11 transmissions.

D.OFDM implements BPSK modulation to allow for data rates up to 7 Gbps.

A.Transmitting station's output power

B.Free Space Path Loss

C.Receiving station's radio sensitivity

D.Receiving station's output power

A.WLAN bridges only work in the 2.4 GHz frequency band and they support only SISO communications

B.WLAN bridges must use a channel with acceptable SNR at both transceivers to maintain the desired data rate bi-directionally

C.WLAN bridges may support MIMO communication, but only if used in the GHz frequency band

D.WLAN bridges must be implemented such that no interference occurs on the channel anywhere between the two endpoints used to establish the bridge

A.Co-channel interference threshold

B.Frame generator utility

C.AES key and block size

D.Power management

E.Roaming aggressiveness

A.Increasing the beacon interval from 100 to 200 (TUs)

B.RF interference from more than 10 nearby Bluetooth transmitters

C.Increasing or decreasing the number of spatial streams in use by the client station and AP

D.Use of passphrase authentication instead of 802.1X/EAP authentication

E.Use of WEP or TKIP for encryption instead of CCMP