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CSMA/CA and DCF define which mechanisms that attempt to ensure that only one 802.11 radio can transmit on the half-duplex RF medium? (Choose all that apply.)
CSMA/CA and DCF define which mechanisms that attempt to ensure that only one 802.11 radio can transmit on the half-duplex RF medium? (Choose all that apply.)A . Random backoff timerB . NAVC . CCMPD . CCAE . Interframe spacingView AnswerAnswer: ABDE
Which field in the MAC header of an 802.11 frame resets the NAV timer for all listening 802.11 stations?
Which field in the MAC header of an 802.11 frame resets the NAV timer for all listening 802.11 stations?A . NAVB . Frame controlC . Duration/IDD . Sequence numberE . Strictly ordered bitView AnswerAnswer: C
How does transmit beamforming (TxBF) use multiple MIMO antennas to increase range?
How does transmit beamforming (TxBF) use multiple MIMO antennas to increase range?A . BeamsteeringB . Phase shiftingC . Dynamic beamformingD . Spatial multiplexingView AnswerAnswer: B
In WLAN security, which authentication methods always create Layer 2 dynamic encryption keys? (Choose 2)
In WLAN security, which authentication methods always create Layer 2 dynamic encryption keys? (Choose 2)A . HTTPS Captive PortalB . WEPC . WPA2-PSKD . EAP-TLSE . Shared KeyF . TKIPView AnswerAnswer: CD
In a long-distance RF link, what statement about Fade Margin is true?
In a long-distance RF link, what statement about Fade Margin is true?A . Fade Margin is an additional pad of signal strength designed into the RF system to compensate for unpredictable signal fading.B . The Fade Margin of a long-distance radio link should be equivalent to the receiver’s antenna gain.C...
Which of the following statements are true? (Choose all that apply.)
Which of the following statements are true? (Choose all that apply.)A . When upfade occurs, the final received signal will be stronger than the original transmitted signal.B . When downfade occurs, the final received signal will never be stronger than the original transmitted signal.C . When upfade occurs, the final...
What problems may exist for a multiple channel architecture (MCA) WLAN when its APs are all operating at full power (typically 100mW)? (Choose 2)
What problems may exist for a multiple channel architecture (MCA) WLAN when its APs are all operating at full power (typically 100mW)? (Choose 2)A . Wi-Fi enabled voice handsets with low transmit power can experience asynchronous downlink and uplink performance.B . WLAN client stations can experience the hidden node problem...
What are the security options available as defined in the original IEEE Std 802.11-1999 (R2003)? (Choose all that apply.)
What are the security options available as defined in the original IEEE Std 802.11-1999 (R2003)? (Choose all that apply.)A . CCMP/AESB . Open System authenticationC . Preshared keysD . Shared Key authenticationE . WEPF . TKIPView AnswerAnswer: BDE
What are of some of the common security capabilities often integrated within access points deployed in a distributed WLAN architecture?
What are of some of the common security capabilities often integrated within access points deployed in a distributed WLAN architecture?A . Captive web portalB . FirewallC . Integrated RADIUSD . WIPSE . All of the aboveView AnswerAnswer: E
What wireless networking term describes the increase of RF energy in an intentional direction with the use of an antenna?
What wireless networking term describes the increase of RF energy in an intentional direction with the use of an antenna?A . Directed RadiationB . Active AmplificationC . Passive GainD . Beam DigressionView AnswerAnswer: C
