CWNP CWNP Certifications CWNA-107 Questions & Answers

• Question 71:

  You are implementing a VHT-capable AP. Which one of the following channels is available in the 802.112016 standard that was not available before the ratification of 802.11 ac?

  A. 153

  B. 161

  C. 144

  D. 56

  Correct Answer: C

• Question 72:

  What ID is typically mapped to an AP's MAC address if a single BSS is implemented?

  A. VLAN ID

  B. BSSID

  C. Device ID

  D. SSID

  Correct Answer: B

  Reference https://technet.microsoft.com/en-us/library/cc757419(v=ws.10).aspx

• Question 73:

  You are troubleshooting a WLAN problem and you suspect hidden node as the cause. What should you look for in a protocol analyzer?

  A. Frames with the HN bit set to 1

  B. Frames with the retry bit set to 0

  C. Frames transmitted from the AP without acknowledgement

  D. Retransmitted frames from multiple STAs at higher rates than other STAs

  Correct Answer: D

  Reference

  http://setup-wireless.blogspot.com/2008/11/wireless-hidden-node.html

• Question 74:

  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-analysismanagement-frames-and-open-auth/ta-p/3120622

• Question 75:

  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 76:

  You are attempting to explain RF shadow and how it can cause lack of coverage. What common building item frequently causes RF shadow and must be accounted for in coverage plans?

  A. Wooden doors

  B. Carpeted floors

  C. Elevators

  D. Cubicle partitions

  Correct Answer: D

• Question 77:

  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 78:

  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 79:

  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 80:

  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