Download Certified Wireless Network Administrator.CWNA-107.SelfTestEngine.2019-07-25.73q.vcex

Vendor: CWNP
Exam Code: CWNA-107
Exam Name: Certified Wireless Network Administrator
Date: Jul 25, 2019
File Size: 43 KB
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Demo Questions

Question 1
An RF signal sometimes bends as it passes through some material other than free space. What is the term that describes this behavior?
  1. Reflection
  2. Refraction
  3. Scattering
  4. Warping
Correct answer: B
Question 2
What can an impedance mismatch in the RF cables and connectors cause?
  1. Fewer MCS values in the MCS table
  2. Excessive VSWR
  3. Increased amplitude of the RF signal
  4. Increased range of the RF signal
Correct answer: B
Explanation:
Reference https://books.google.com.pk/books?id=uA68E68OqQgC&pg=PA235&lpg=PA235&dq=impedance+mismatch+in+the+RF+cables+and+connectors+cause&source=bl&ots=WEynkTBqO1&sig=-Hm_d26REw_UrVZtz20xErL-4Rg&hl=en&sa=X&ved=0ahUKEwj5rvW0j57ZAhVMzqQKHeCGB0kQ6AEISDAF#v=onepage&q=impedance%20mismatch%20in%20the%20RF%20cables%20and%20connectors%20cause&f=false
Reference https://books.google.com.pk/books?id=uA68E68OqQgC&pg=PA235&lpg=PA235&dq=impedance+mismatch+in+the+RF+cables+and+connectors+cause&source=bl&ots=WEynkTBqO1&sig=-Hm_d26REw_UrVZtz20xErL-4Rg&hl=en&sa=X&ved=0ahUKEwj5rvW0j57ZAhVMzqQKHeCGB0kQ6AEISDAF#v=onepage&q=impedance%20mismatch%20in%20the%20RF%20cables%20and%20connectors%20cause&f=false
Question 3
In a long-distance RF link, which statement about Fade Margin is true?
  1. The Fade Margin is a measurement of signal loss through free space and is a function of frequency and distance.
  2. The Fade Margin of a long-distance radio link should be equivalent to the receiver’s low noise filter gain.
  3. A Fade Margin is unnecessary on a long-distance RF link if more than 80% of
  4. Fade Margin is an additional pad of signal strength designed into the RF system to compensate for unpredictable signal fading.
Correct answer: D
Question 4
Which directional antenna types are commonly used by indoor Wi-Fi devices in a MIMO multiple spatial stream implementation?
  1. Dish and grid
  2. Dipole and yagi
  3. Grid and sector
  4. Patch and panel
Correct answer: D
Question 5
What statement about the beamwidth of an RF antenna is true?
  1. Horizontal and vertical beamwidth are calculated at the point where the main lobe decreases power by 3 dB.
  2. Vertical beamwidth is displayed (in degrees) on the antenna’s Azimuth chart.
  3. When antenna gain is lower, the beamwidth is also lower in both the horizontal and vertical dimensions.
  4. The beamwidth patterns on an antenna polar chart indicate the point at which the RF signal stops propagating.
Correct answer: A
Question 6
Which one of the following is not a factor considered when calculating the Link Budget for an outdoor point-to-point WLAN bridge link?
  1. MU-MIMO capabilities of the bridges
  2. Receive antenna gain
  3. Transmit power
  4. Operating frequency
Correct answer: A
Question 7
What best describes WPA2 in relation to 802.11 wireless networks?
  1. WPA2 is specified in the 802.11 standard as implementing CCMP/AES.
  2. WPA2 is the standard that defines security for WLANs.
  3. WPA2 is a certification created by the Wi-Fi Alliance that validates devices correctly implement CCMP/AES.
  4. WPA2 is the second version of WPA and it enhances security through the use of TKIP instead of WEP.
Correct answer: C
Question 8
You are implementing a VHT-capable AP. Which one of the following channels is available in the 802.11-2016 standard that was not available before the ratification of 802.11 ac?
  1. 153
  2. 161
  3. 144
  4. 56
Correct answer: C
Question 9
What statement is true concerning the use of Orthogonal Frequency Division Multiplexing (OFDM) modulation method in IEEE 802.11 WLANs?
  1. OFDM was used by Frequency Hopping Spread Spectrum (FHSS) PHY devices.
  2. OFDM was first introduced in 802.11 and is used by the ERP, HT and VHT PHYs as well.
  3. OFDM implement BPSK modulation to allow for data rates up to 7 Gbps.
  4. OFDM modulation is used only in 5 GHz 802.11 transmissions.
Correct answer: B
Explanation:
Reference: http://www.rhyshaden.com/802_11a.htm
Reference: http://www.rhyshaden.com/802_11a.htm
Question 10
Which IEEE 802.11 physical layer (PHY) specification includes support for and compatibility with both ERP and HR/DSSS?
  1. VHT (802.11ac)
  2. OFDM (802.11a)
  3. DSSS (802.11-Prime)
  4. HT (802.11n)
Correct answer: D
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