Download Certified Wireless Network Administrator.CWNA-107.Pass4sures.2018-12-11.71q.vcex

Vendor: CWNP
Exam Code: CWNA-107
Exam Name: Certified Wireless Network Administrator
Date: Dec 11, 2018
File Size: 43 KB
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Demo Questions

Question 1
What factor is likely to cause the least impact on the application layer throughput of an 802.11n client station in a 2.4 GHz HT BSS?
  1. Increasing or decreasing the number of spatial streams in use by the client station and AP
  2. Implementation of several other clients in the same BSS using 802.11 g radios
  3. Implementing Fast BSS Transition (FT) for roaming
  4. RF interference from more than 10 nearby Bluetooth transmitters
Correct answer: A
Question 2
What ID is typically mapped to an AP’s MAC address if a single BSS is implemented?
  1. VLAN ID
  2. BSSID
  3. Device ID
  4. SSID
Correct answer: B
Explanation:
Reference https://technet.microsoft.com/en-us/library/cc757419(v=ws.10).aspx
Reference https://technet.microsoft.com/en-us/library/cc757419(v=ws.10).aspx
Question 3
What is appended to the end of each 802.11 data frame after the payload?
  1. FCS
  2. Preamble
  3. MAC header
  4. PHY header
Correct answer: A
Question 4
When an ACK frame is not received by the transmitting STA, what is assumed?
  1. The frame was correctly delivered
  2. The frame was not delivered and must be retransmitted
  3. The receiver is offline
  4. The receiver processed the frame, but did not respond with an ACK frame because 802.11w is enabled
Correct answer: B
Question 5
When a client station sends a broadcast probe request frame with a wildcard SSID, how do APs respond?
  1. For each probe request frame, only one AP may reply with a probe response.
  2. Each AP responds in turn after preparing a probe response and winning contention.
  3. Each AP checks with the DHCP server to see if it can respond and then acts accordingly.
  4. After waiting a SIFS, all APs reply at the same time with a probe response.
Correct answer: B
Question 6
What security solution is deprecated in the 802.11 standard and should never be used in any modern WLAN deployment?
  1. AES
  2. Shared Key Authentication
  3. CCMP
  4. Open System Authentication
Correct answer: B
Question 7
You are reconfiguring an AP to use the short guard interval. How long will the new guard interval duration be after the change?
  1. 400 ns
  2. 10 ms
  3. 800 ns
  4. 104 ms
Correct answer: A
Explanation:
Reference https://www.sonicwall.com/en-us/support/knowledge-base/170504672960493
Reference https://www.sonicwall.com/en-us/support/knowledge-base/170504672960493
Question 8
What statement about the IEEE 802.11-2016 QoS facility is true?
  1. 802.11 QoS is achieved by giving high priority queues a statistical advantage at winning contention.
  2. Four 802.1p user priorities are mapped to eight 802.11 transmit queues.
  3. 802.11 control frames are assigned to the 802.11 EF priority queue.
  4. When the Voice queue has frames awaiting transmission, no data will be transmitted from the Best Effort queue.
Correct answer: A
Question 9
You manage a WLAN with 100 802.11ac access points. All access points are configured to use 80 MHz channels. In a particular BSS, only 40 MHz communications are seen. What is the likely cause of this behavior?
  1. The short guard interval is also enabled.
  2. The clients are all 802.11n STAs or lower
  3. The AP is improperly configured to use only 40 MHz of the 80 MHz allocated bandwidth
  4. All clients implement single spatial stream radios
Correct answer: C
Question 10
When compared with legacy Power Save mode, how does VHT TXOP power save improve battery life for devices on a WLAN?
  1. VHT TXOP power save allows stations to enter sleep mode and legacy Power Save does not.
  2. VHT TXOP power save allows the WLAN transceiver to disable more components when in a low power state.
  3. VHT TXOP power save uses the partial AID in the preamble to allow clients to identify frames targeted for them.
  4. Legacy Power Save mode was removed in the 802.11ac amendment.
Correct answer: C
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