CWNA-108 Wireless Network Administrator
UPDATED ACTUAL Exam Questions and
CORRECT Answers
RF signal bending - CORRECT ANSWER - Refraction of RF signal passing through
material
Impedance mismatch - CORRECT ANSWER - Causes excessive VSWR in RF cables and
connectors
Factors influencing RF signal distance - CORRECT ANSWER - Receiving station's output
power, transmitting station's output power, Free Space Path Loss
EIRP calculation - CORRECT ANSWER - EIRP = Transmitter power - Cable loss +
Antenna gain
Fade Margin - CORRECT ANSWER - Additional pad of signal strength to compensate for
unpredictable signal fading in long-distance RF links
Passive Gain - CORRECT ANSWER - Increase of RF energy in an intentional direction
with the use of an antenna
Directional antennas for indoor Wi-Fi - CORRECT ANSWER - Patch and panel antennas
Beamwidth of an RF antenna - CORRECT ANSWER - Horizontal and vertical beamwidth
calculated at the points where the main lobe decreases power by 3dB
Factors in Link Budget calculation - CORRECT ANSWER - Operating frequency, Receive
antenna gain, Transmit power
, WPA2 definition - CORRECT ANSWER - Standard that defines security for WLANs
IEEE 802.11 amendment in draft state - CORRECT ANSWER - No impact until ratified,
does not become part of the standard
VHT-capable AP channels - CORRECT ANSWER - Channel 144
Orthogonal Frequency Division Multiplexing (OFDM) - CORRECT ANSWER - Used by
ERP, HT, and VHT PHYs in 802.11 WLANs
IEEE 802.11 physical layer (PHY) with ERP and HR/DSSS support - CORRECT
ANSWER - HT (802.11n)
BSS WLAN use case - CORRECT ANSWER - WLAN with an AP and multiple
connecting clients
Impact of Fast BSS Transition (FT) on application layer throughput - CORRECT
ANSWER - Implementing FT for roaming can improve application layer throughput
BSSID definition - CORRECT ANSWER - Identifier mapped to an AP's MAC address in
a single BSS
FCS definition - CORRECT ANSWER - Frame Check Sequence, appended to the end of
each 802.11 data frame after the payload
Assumption when an ACK frame is not received - CORRECT ANSWER - The frame was
not delivered and must be retransmitted
Response of APs to broadcast probe request frame with wildcard SSID - CORRECT
ANSWER - Each AP responds in turn after preparing a probe response and winning
contention
UPDATED ACTUAL Exam Questions and
CORRECT Answers
RF signal bending - CORRECT ANSWER - Refraction of RF signal passing through
material
Impedance mismatch - CORRECT ANSWER - Causes excessive VSWR in RF cables and
connectors
Factors influencing RF signal distance - CORRECT ANSWER - Receiving station's output
power, transmitting station's output power, Free Space Path Loss
EIRP calculation - CORRECT ANSWER - EIRP = Transmitter power - Cable loss +
Antenna gain
Fade Margin - CORRECT ANSWER - Additional pad of signal strength to compensate for
unpredictable signal fading in long-distance RF links
Passive Gain - CORRECT ANSWER - Increase of RF energy in an intentional direction
with the use of an antenna
Directional antennas for indoor Wi-Fi - CORRECT ANSWER - Patch and panel antennas
Beamwidth of an RF antenna - CORRECT ANSWER - Horizontal and vertical beamwidth
calculated at the points where the main lobe decreases power by 3dB
Factors in Link Budget calculation - CORRECT ANSWER - Operating frequency, Receive
antenna gain, Transmit power
, WPA2 definition - CORRECT ANSWER - Standard that defines security for WLANs
IEEE 802.11 amendment in draft state - CORRECT ANSWER - No impact until ratified,
does not become part of the standard
VHT-capable AP channels - CORRECT ANSWER - Channel 144
Orthogonal Frequency Division Multiplexing (OFDM) - CORRECT ANSWER - Used by
ERP, HT, and VHT PHYs in 802.11 WLANs
IEEE 802.11 physical layer (PHY) with ERP and HR/DSSS support - CORRECT
ANSWER - HT (802.11n)
BSS WLAN use case - CORRECT ANSWER - WLAN with an AP and multiple
connecting clients
Impact of Fast BSS Transition (FT) on application layer throughput - CORRECT
ANSWER - Implementing FT for roaming can improve application layer throughput
BSSID definition - CORRECT ANSWER - Identifier mapped to an AP's MAC address in
a single BSS
FCS definition - CORRECT ANSWER - Frame Check Sequence, appended to the end of
each 802.11 data frame after the payload
Assumption when an ACK frame is not received - CORRECT ANSWER - The frame was
not delivered and must be retransmitted
Response of APs to broadcast probe request frame with wildcard SSID - CORRECT
ANSWER - Each AP responds in turn after preparing a probe response and winning
contention
