What is appended to the end of each 802.11 data frame after the payload?

• A.FCS
• B.MAC header
• C.Preamble
• D.PHY header

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

• A.OFDM implements BPSK modulation to allow for data rates up to 7 Gbps.
• 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 was used by Frequency Hopping Spread Spectrum (FHSS) PHY devices.

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What phrase defines Equivalent Isotropically Radiated Power (EIRP)?

• A.Power supplied from the transmission line to the antenna input
• B.The power output from the radio after cable losses
• C.The highest RF signal strength that is transmitted from a given antenna
• D.The power output from the radio into the RF cable
• E.Reflected power due to an impedance mismatch in the signal path

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When replacing the antenna of a WLAN device with a similar antenna type that has a higher passive gain,
what antenna characteristic will decrease?

• A.Beam width
• B.Receive sensitivity
• C.Range
• D.Active gain

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What Linux shell command can be used to view the hardware and PHY capabilities of a wireless adapter
in detail including channel widths, output power settings, channels supported, and more?

• A.iw phy
• B.netsh wlan show device
• C.iwconfig
• D.ifconfig

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