File Info
| Exam | Certified Wireless Network Administrator |
| Number | CWNA-107 |
| File Name | CWNP.CWNA-107.TestKing.2018-10-25.62q.vcex |
| Size | 35 KB |
| Posted | Oct 25, 2018 |
| Download | CWNP.CWNA-107.TestKing.2018-10-25.62q.vcex |
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Demo Questions
Question 1
What statement is true concerning the use of Orthogonal Frequency Division Multiplexing (OFDM) modulation method in IEEE 802.11 WLANs?
- OFDM was used by Frequency Hopping Spread Spectrum (FHSS) PHY devices.
- OFDM was first introduced in 802.11 and is used by the ERP, HT and VHT PHYs as well.
- OFDM implement BPSK modulation to allow for data rates up to 7 Gbps.
- OFDM modulation is used only in 5 GHz 802.11 transmissions.
Correct answer: D
Explanation:
Reference http://www.rhyshaden.com/802_11a.htm Reference http://www.rhyshaden.com/802_11a.htm
Question 2
Which IEEE 802.11 physical layer (PHY) specification includes support for and compatibility with both ERP and HR/DSSS?
- VHT (802.11ac)
- OFDM (802.11a)
- DSSS (802.11-Prime)
- HT (802.11n)
Correct answer: D
Question 3
An 802.11-based network uses an AP and has several connecting clients. The clients include iPhones, iPads, laptops and one desktop. What WLAN use case is represented?
- WPAN
- Ad-hoc
- BSS
- IBSS
Correct answer: C
Question 4
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?
- Increasing or decreasing the number of spatial streams in use by the client station and AP
- Implementation of several other clients in the same BSS using 802.11 g radios
- Implementing Fast BSS Transition (FT) for roaming
- RF interference from more than 10 nearby Bluetooth transmitters
Correct answer: A
Question 5
What ID is typically mapped to an AP’s MAC address if a single BSS is implemented?
- VLAN ID
- BSSID
- Device ID
- 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 6
What is appended to the end of each 802.11 data frame after the payload?
- FCS
- Preamble
- MAC header
- PHY header
Correct answer: A
Question 7
When an ACK frame is not received by the transmitting STA, what is assumed?
- The frame was correctly delivered
- The frame was not delivered and must be retransmitted
- The receiver is offline
- The receiver processed the frame, but did not respond with an ACK frame because 802.11w is enabled
Correct answer: B
Question 8
When a client station sends a broadcast probe request frame with a wildcard SSID, how do APs respond?
- For each probe request frame, only one AP may reply with a probe response.
- Each AP responds in turn after preparing a probe response and winning contention.
- Each AP checks with the DHCP server to see if it can respond and then acts accordingly.
- After waiting a SIFS, all APs reply at the same time with a probe response.
Correct answer: B
Question 9
What security solution is deprecated in the 802.11 standard and should never be used in any modern WLAN deployment?
- AES
- Shared Key Authentication
- CCMP
- Open System Authentication
Correct answer: B
Question 10
You are reconfiguring an AP to use the short guard interval. How long will the new guard interval duration be after the change?
- 400 ns
- 10 ms
- 800 ns
- 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
