| Exam Code | CWNA-108 |
| Exam Name | Certified Wireless Network Administrator |
| Questions | 60 Questions Answers With Explanation |
| Update Date | July 15,2024 |
| Price |
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When an ACK frame is not received by the transmitting STA, what is assumed?
A. The receiver processed the frame, but did not respond with an ACK frame because 802.11w is enabled
B. The frame was correctly delivered
C. The frame was not delivered and must be retransmitted
D. The receiver is offline
You are tasked with performing a throughput test on the WLAN. The manager asks that you use open source tools to reduce costs. What open source tool is designed to perform a throughput test?
A. iPerf
B. PuTTy
C. IxChariot
D. Python
You have received a report of poor wireless connections on the third floor of a building under your administration. Three individuals have reported the problem. Apparently, the connections are reporting a strong signal, but the users cannot access the Internet. With the problem identified, what is the next logical step in the troubleshooting process?
A. Verify the solution
B. Discover the scale of the problem
C. Perform corrective actions
D. Create a plan of action or escalate the problem
A WLAN is implemented using wireless controllers. The APs must locate the controllers when powered on and connected to the network. Which one of the following methods is commonly used to locate the controllers by the APs?
A. NTP
B. DHCP
C. SNMP
D. GRE
Your manager asked you to locate a solution that allows for centralized monitoring of WLAN performance over time. He wants a single pane of glass for administration and monitoring of the solution. What do you recommend?
A. Laptop-based spectrum analyzers
B. AP-based spectrum analysis
C. Overlay WLAN monitoring solution
D. Laptop-based protocol analyzers
What is appended to the end of each 802.11 data frame after the payload?
A. Preamble
B. MAC header
C. PHY header
D. FCS
What cipher suite is specified by the 802.11-2016 standard and is not deprecated?
A. Wired Equivalent Privacy
B. Temporal Key Integrity Protocol
C. Counter Mode with CBC-MAC Protocol
D. Extensible Authentication Protocol
When compared with legacy Power Save mode, how does VHT TXOP power save improve battery life for devices on a WLAN?
A. Legacy Power Save mode was removed in the 802.11ac amendment.
B. VHT TXOP power save allows the WLAN transceiver to disable more components when in a low power state.
C. VHT TXOP power save uses the partial AID in the preamble to allow clients to identify frames targeted
for them.
D. VHT TXOP power save allows stations to enter sleep mode and legacy Power Save does not.
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. 26 dBm
B. 13 dBm
C. 23 dBm
D. 10 dBm
You were previously onsite at XYZ’s facility to conduct a pre-deployment RF site survey. The WLAN has been deployed according to your recommendations and you are onsite again to perform a post-deployment validation survey.When performing this type of post-deployment RF site survey voice over Wi-Fi, what is an action that must be performed?
A. Spectrum analysis to locate and identify RF interference sources.
B. Frequency-band hopping analysis to detect improper RF channel implementations.
C. Application analysis with an active phone call on an VoWiFi handset.
D. Protocol analysis to discover channel use on neighboring APs.
What statement about the beamwidth of an RF antenna is true?
A. Horizontal and vertical beamwidth are calculated at the points where the main lobe decreases power by 3 dB.
B. The beamwidth patterns on an antenna polar chart indicate the point at which the RF signal stops propagating.
C. When antenna gain is lower, the beamwidth is also lower in both the horizontal and vertical dimensions.
D. Vertical beamwidth is displayed (in degrees) on the antenna’s Azimuth chart.
You are reconfiguring an AP to use the short guard interval. How long will the new guard interval duration be after the change?
A. 800 ns
B. 400 ns
C. 104 ms
D. 10 ms
What ID is typically mapped to an AP’s MAC address if a single BSS is implemented?
A. SSID
B. Device ID
C. VLAN ID
D. BSSID
What primary metric of scanning can stations use to select the best AP for connectivity to the desired BSS?
A. Signal strength of AP beacons received.
B. PING latency when testing against an Internet server.
C. Throughput speed in Mbps.
D. FCS errors in frames transmitted to and from the AP.
During a post-implementation survey, you have detected a non-802.11 wireless device transmitting in the area used by handheld 802.11g scanners. What is the most important factor in determining the impact of this non-802.11 device?
A. Receive sensitivity
B. Channel occupied
C. Airtime utilization
D. Protocols utilized
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. Operating frequency
B. MU-MIMO capabilities of the bridges
C. Receive antenna gain
D. Transmit power
A dual-band 802.11ac AP must be powered by PoE. As a class 4 device, what power level should be received at the AP?
A. 30 W
B. 12.95 W
C. 25.5 W
D. 15.4 W
You are deploying a WLAN with the access points configured for 10 mW of output power on the 2.4 GHz radios and 20 mW of output power on the 5GHz radios. Some semi-directional antennas are also in use. What kind of deployment is described?
A. SOHO
B. Residential
C. High density
D. Standard office
You are performing a post-implementation validation survey. What basic tool can be used to easily locate areas of high co-channel interference?
A. Throughput tester
B. Laptop-based spectrum analyzer
C. Access point spectrum analyzer
D. Wi-Fi scanner
An IEEE 802.11 amendment is in the daft state. What impact does this draft amendment have on the 802.11 standard?
A. Devices will be released based on the draft amendment and the draft amendment features are part of the standard.
B. No impact: Until an amendment is ratified, it does not become part of the standard.
C. No impact: Draft amendments do not become part of the standard until a working group is formed.
D. The standard is changed to reflect the new capabilities as soon as an amendment enters the draft stage.
