CWNA Practice UPDATED Exam
Questions and CORRECT Answers
An RF signal sometimes bends as it passes through some material other than free space. What is
the term that describes this behavior?
A. Reflection
B. Refraction
C. Scattering
D. Warping - CORRECT ANSWER - B. Refraction
A WLAN transmitter that emits a 50 mW signal is connected to a cable with 3 dB loss. If the
cable is connected to an antenna with 9dBi gain, what is the EIRP at the antenna element?
A. 23dBm
B. 26dBm
C. 13 dBm
D. 10 dBm - CORRECT ANSWER - A. 23dBm
What wireless networking term describes the increase of RF energy in an intentional direction
with the use of an antenna?
A. DirectedRadiation
B. Active Amplification
C. Passive Gain
D. Beam Digression - CORRECT ANSWER - C. Passive Gain
Which directional antenna types are commonly used by indoor Wi-Fi devices in a MIMO
multiple spatial stream implementation?
,A. Dish and grid
B. Dipole and yagi
C. Grid and sector
D. Patch and panel - CORRECT ANSWER - D. Patch and panel
What statement about the beamwidth of an RF antenna is true?
A. Horizontal and vertical beamwidth are calculated at the point where the main lobe decreases
power by 3dB.
B. Vertical beamwidth is displayed (in degrees) on the antenna's Azimuth chart.
C. When antenna gain is lower, the beamwidth is also lower in both the horizontal and vertical
dimensions.
D. The beamwidth patterns on an antenna polar chart indicate the point at which the RF signal
stops propagating. - CORRECT ANSWER - A. Horizontal and vertical beamwidth are
calculated at the point where the main lobe decreases power by 3dB.
Which one of the following is not a factor considered when calculating the Link Budget for an
outdoor point-to-point WLAN bridge link?
A. MU-MIMO capabilities of the bridges
B. Receive antenna gain
C. Transmit power
D. Operating frequency - CORRECT ANSWER - A. MU-MIMO capabilities of the
bridges
You are implementing a VHT-capable AP. Which one of the following channels is available in
the 802.11-2016 standard that was not available before the ratification of 802.11 ac?
A. 153
, B. 161
C. 144
D. 56 - CORRECT ANSWER - C. 144
What ID is typically mapped to an AP's MAC address if a single BSS is implemented?
A. VLANID
B. BSSID
C. Device ID
D. SSID - CORRECT ANSWER - B. BSSID
When a client station sends a broadcast probe request frame with a wildcard SSID, how do APs
respond?
A. For each probe request frame, only one AP may reply with a probe response.
B. Each AP responds in turn after preparing a probe response and winning contention.
C. Each AP checks with the DHCP server to see if it can respond and then acts accordingly.
D. After waiting a SIFS, all APs reply at the same time with a probe response. - CORRECT
ANSWER - B. Each AP responds in turn after preparing a probe response and winning
contention.
You are reconfiguring an AP to use the short guard interval. How long will the new guard
interval duration be after the change?
A. 400ns
B. 10ms
C. 800 ns
D. 104 ms - CORRECT ANSWER - A. 400ns
Questions and CORRECT Answers
An RF signal sometimes bends as it passes through some material other than free space. What is
the term that describes this behavior?
A. Reflection
B. Refraction
C. Scattering
D. Warping - CORRECT ANSWER - B. Refraction
A WLAN transmitter that emits a 50 mW signal is connected to a cable with 3 dB loss. If the
cable is connected to an antenna with 9dBi gain, what is the EIRP at the antenna element?
A. 23dBm
B. 26dBm
C. 13 dBm
D. 10 dBm - CORRECT ANSWER - A. 23dBm
What wireless networking term describes the increase of RF energy in an intentional direction
with the use of an antenna?
A. DirectedRadiation
B. Active Amplification
C. Passive Gain
D. Beam Digression - CORRECT ANSWER - C. Passive Gain
Which directional antenna types are commonly used by indoor Wi-Fi devices in a MIMO
multiple spatial stream implementation?
,A. Dish and grid
B. Dipole and yagi
C. Grid and sector
D. Patch and panel - CORRECT ANSWER - D. Patch and panel
What statement about the beamwidth of an RF antenna is true?
A. Horizontal and vertical beamwidth are calculated at the point where the main lobe decreases
power by 3dB.
B. Vertical beamwidth is displayed (in degrees) on the antenna's Azimuth chart.
C. When antenna gain is lower, the beamwidth is also lower in both the horizontal and vertical
dimensions.
D. The beamwidth patterns on an antenna polar chart indicate the point at which the RF signal
stops propagating. - CORRECT ANSWER - A. Horizontal and vertical beamwidth are
calculated at the point where the main lobe decreases power by 3dB.
Which one of the following is not a factor considered when calculating the Link Budget for an
outdoor point-to-point WLAN bridge link?
A. MU-MIMO capabilities of the bridges
B. Receive antenna gain
C. Transmit power
D. Operating frequency - CORRECT ANSWER - A. MU-MIMO capabilities of the
bridges
You are implementing a VHT-capable AP. Which one of the following channels is available in
the 802.11-2016 standard that was not available before the ratification of 802.11 ac?
A. 153
, B. 161
C. 144
D. 56 - CORRECT ANSWER - C. 144
What ID is typically mapped to an AP's MAC address if a single BSS is implemented?
A. VLANID
B. BSSID
C. Device ID
D. SSID - CORRECT ANSWER - B. BSSID
When a client station sends a broadcast probe request frame with a wildcard SSID, how do APs
respond?
A. For each probe request frame, only one AP may reply with a probe response.
B. Each AP responds in turn after preparing a probe response and winning contention.
C. Each AP checks with the DHCP server to see if it can respond and then acts accordingly.
D. After waiting a SIFS, all APs reply at the same time with a probe response. - CORRECT
ANSWER - B. Each AP responds in turn after preparing a probe response and winning
contention.
You are reconfiguring an AP to use the short guard interval. How long will the new guard
interval duration be after the change?
A. 400ns
B. 10ms
C. 800 ns
D. 104 ms - CORRECT ANSWER - A. 400ns
