CWNP CWNA CWNA-107 Questions & Answers

• Question 151:

  You are reporting on the RF environment in you facility. The manager asks you do describe the noise floor noted in the report. Which of the following is the best explanation?

  A. The energy radiated by flooring materials that causes interference in the 2.4 GHz and 5 GHz bands.

  B. The noise caused by elevators, microwave ovens, and video transmitters.

  C. The RF energy that exists in the environment from intentional and unintentional RF radiators that forms the baseline above which the Intentional signal of your WLAN must exist.

  D. The extra energy radiated by access points and client devices beyond that intended for the signal.

  Correct Answer: B

  Reference http://blog.prosig.com/2008/04/14/what-is-db-noise-floor-dynamic-range/

• Question 152:

  The BSA of an AP covers the area used by the sales and marketing department. Thirty-five stations operate in this space. The users indicate that they need more throughput and all stations are 5 GHz capable 802.11ac clients. The current AP configuration uses 20 MHz channels in both 2.4 GHz and 5 GHz. What is the least expensive solution available for increasing throughput for these users without implementing configuration options that are not recommended?

  A. Use a 160 MHz channel on the 5 GHz radio

  B. Use a 40 MHz channel on the 5 GHz radio

  C. Install a second AP in the coverage area

  D. Use a 40 MHz channel on the 2.4 GHz radio

  Correct Answer: C

• Question 153:

  What best describes WPA2 in relation to 802.11 wireless networks?

  A. WPA2 is specified in the 802.11 standard as implementing CCMP/AES.

  B. WPA2 is the standard that defines security for WLANs.

  C. WPA2 is a certification created by the Wi-Fi Alliance that validates devices correctly implement CCMP/ AES.

  D. WPA2 is the second version of WPA and it enhances security through the use of TKIP instead of WEP.

  Correct Answer: B

• Question 154:

  You are implementing a multi-AP WLAN and fast secure roaming is essential. Which one of the following methods is an IEEE 802.11 standard method for fast roaming?

  A. Band steering

  B. FT

  C. OKC

  D. Load balancing

  Correct Answer: B

  Reference https://www.networkcomputing.com/wireless-infrastructure/wifi-fast-roaming-simplified/1993108957

• Question 155:

  As an RF wave propagates through space, the wave front experiences natural expansion that reduces its signal strength in an area. What term describes the rate at which this expansion happens?

  A. Inverse square law

  B. Ohm's law

  C. Fresnel zone thinning

  D. MU-MIMO

  Correct Answer: A

• Question 156:

  What is the most effective method of testing roaming in relation to 802.11 VoIP handsets?

  A. Use the built-in roaming monitor built into all VoIP handsets.

  B. Use a protocol analyzer to capture the traffic generated when a laptop roams.

  C. Place a call with the handset and move around the facility to test quality during roaming.

  D. Use a spectrum analyzer to monitor RF activity during a VoIP call.

  Correct Answer: C