Certified Wireless Analysis Professional 試験
Question No : 1
Which piece of information Is not transmitted in an HT PDDU header?
Question No : 2
When performing protocol analysis, you capture an 802.11ac data frame on channel 52, transmitted at MSC 8.
At what data rate was the PHY Preamble transmitted?
Explanation:The transmitter sends the preamble at 1 Mbps (802.11 or 802.11b DSSS) or 6 Mbps (802.11a or 802.11g ERP-OFDM).
Question No : 3
Which one of the following portions of information is communicated in the PHY Header?
Question No : 4
A PHY Header is added to the PSDU at which sub-layer?
The PLCP adds a preamble and PHY header to the PSDU.
Question No : 5
What is the function of the PHY Preamble?
Question No : 6
What is the function of the PMD sub-layer?
Question No : 7
Finish the statement. It is possible to distinguish between _______and ______20 MHz transmissions when looking at an FFT plot.
Question No : 8
A manufacturing facility has installed a new automation system which incorporates an 802.11 wireless network. The automation system is controlled from tablet computers connected via the WLAN.
However, the automation system has not gone live due to problem with the tablets connecting to the WLAN. The WLAN vendor has been onsite to perform a survey and confirmed good primary and secondary coverage across the facility. As a CWAP you are called in to perform Spectrum Analysis to identify any interference sources. From the spectrum analysis, you did not identify any interference sources but were able to correctly identify the issue.
Which of the following issues did you identify from the spectrum analysis?
Question No : 9
Which common feature of a Spectrum Analyzer would be the best to help you locate a non-802.11
Question No : 10
You have installed a new 802.11ac WLAN configured with 80 MHz channels. Users in one area are
complaining about poor performance. This area is currently served by a single AP. You take a spectrum
analysis capture in the poor performing areA. While examining the waterfall plot you notice the airtime
utilization is higher on the first 20 MHz of the 80 MHz channel when compared to the rest of the channel.
What do you conclude?
A. The AP is misconfigured and needs to be reconfigured to 80MHz operation
B. RRM is enabled and has dynamically picked a 20 MHz channel
C. The first 20 MHz is the AP’s primary channel and higher airtime utilization on the primary channel is normal when an AP Is configured for 80 MHz operation
D. Non Wi-Fi interference is preventing the APs 80 MHz operation
Question No : 11
In a Spectrum Analyzer the Swept Spectrogram plot displays what information?
Question No : 12
ABC International has installed a new smart ZigBee controlled lighting system.
However, the network team is concerned that this new system will interface with the existing WLAN and has asked you to investigate the impact of the two systems operating simultaneously in the 2.4 GHz band. When performing Spectrum Analysis, which question could you answer by looking at the FFT plot?
Question No : 13
You’re the WLAN administrator for a large retailer based at the HQ in New York. The London-based office has been complaining about WLAN disconnections around lunch time each day. You suspect this might be interference from the staff microwave, how might you test your theory from the New York office?
Question No : 14
Which one of the following is required for Wi-Fi integration in laptop-based Spectrum Analyzer software?
Question No : 15
802.11k Neighbor Requests and Neighbor Reports are sent in what type of Management Frames?