CWNP CWNP Certification CWNA-108 Questions & Answers

• Question 11:

  A client STA must choose the best AP for connectivity. As part of the evaluation, it must verify compatible data rates. What can the client STA use to verify that an AP supports the same data rates that it supports?

  A. Beacon frames transmitted by the AP

  B. Data frames sent between the AP and current client STAs

  C. Authentication frames transmitted by the other client STAs

  D. Probe request frames transmitted by other client STAs

  Correct Answer: D

  Reference https://supportforums.cisco.com/t5/wireless-mobility-documents/802-11-sniffer-capture-analysis- management-frames-and-open-auth/ta-p/3120622

• Question 12:

  The IEEE 802.11-2016 standard requires VHT capable devices to be backward compatible with devices using which other 802.11 physical layer specification (PHY)?

  A. ERP-PBCC

  B. DSSS

  C. OFDM

  D. HR/DSSS

  Correct Answer: C

• Question 13:

  When considering data rates available in HT and VHT PJY devices, in addition to the modulation, coding, channel width, and spatial streams, what impacts the data rate according to the MCS tables?

  A. The Frequency band in use

  B. The client drivers

  C. The guard interval

  D. The height of the antennas

  Correct Answer: C

  Reference https://arxiv.org/pdf/1702.03257.pdf

• Question 14:

  A string of characters and digits is entered into an AP a client STA for WPA2 security. The string is 8 characters long. What is this string called?

  A. MSK

  B. WEP key

  C. Passphrase

  D. PSK

  Correct Answer: C

  Reference http://www.arubanetworks.com/techdocs/ArubaOS_64x_WebHelp/Content/ArubaFrameStyles/VirtualAPs/ SSID_Profiles.htm

• Question 15:

  You are deploying a WLAN monitoring solution that utilizes distributed sensor devices. Where should sensors be deployed for best results?

  A. Every 20 feet and alongside each AP

  B. Closer to the APs

  C. Closer to the client devices

  D. In critical areas where WLAN performance must be high

  Correct Answer: C

• Question 16:

  What can an impedance mismatch in the RF cables and connectors cause?

  A. Fewer MCS values in the MCS table

  B. Excessive VSWR

  C. Increased amplitude of the RF signal

  D. Increased range of the RF signal

  Correct Answer: B

  Reference: https://books.google.com.pk/books?id=uA68E68OqQgCandpg=PA235andlpg=PA235anddq=impedance +mismatch+in+the+RF+cables+and+connectors+causeandsource=blandots=WEynkTBqO1andsig=- Hm_d26REw_UrVZtz20xErL4Rgandhl=enandsa=Xandved=0ahUKEwj5rvW0j57ZAhVMzqQKHeCGB0kQ6AEISDAF#v=onepageandq=impedan ce%20mismatch%20in%20the%20RF%20cables%20and%20connectors%20causeandf=false

• Question 17:

  You administer a WLAN that offers a guest SSID of GUESTNWORK. Users connect to the GUESTNWORK SSID, but report that they cannot browse the Internet. The devices simply report no Internet connection. What common problem causes this scenario?

  A. NTP issues

  B. Hardware issues

  C. IP routing issues

  D. Captive portal issues

  Correct Answer: C

• Question 18:

  When an ACK frame is not received by the transmitting STA, what is assumed?

  A. The frame was correctly delivered

  B. The frame was not delivered and must be retransmitted

  C. The receiver is offline

  D. The receiver processed the frame, but did not respond with an ACK frame because 802.11w is enabled

  Correct Answer: B

• Question 19:

  When performing a validation survey for a Multiple Channel Architecture (MCA) system in a multi-tenant building with five floors, what aspect should you, as the surveyor, keep in mind?

  A. The RF interference caused by passing airplanes supporting on-board Wi-Fi should be a prime consideration

  B. The channel reuse pattern should be three dimensional with the RF cell extending coverage of each access point to other floors

  C. The omni-directional antennas of the access points should be oriented parallel to the floor to maximize the coverage pattern across as many floors as possible

  D. The Fresnel Zone is completely blocked between floors so each floor is considered a separate site survey

  Correct Answer: B

• Question 20:

  In a long-distance RF link, which statement about Fade Margin is true?

  A. The Fade Margin is a measurement of signal loss through free space and is a function of frequency and distance.

  B. The Fade Margin of a long-distance radio link should be equivalent to the receiver's low noise filter gain.

  C. A Fade Margin is unnecessary on a long-distance RF link if more than 80% of the first Fresnel zone is clear of obstructions.

  D. Fade Margin is an additional pad of signal strength designed into the RF system to compensate for unpredictable signal fading.

  Correct Answer: D