Refresh CWNA-107 Exam Price For Certified Wireless Network Administrator (CWNA) Certification

NEW QUESTION 1
You recently purchased four laptops containing dual-band 802.11ac adapters. The laptops can connect to your 2.4 GHz network, but they cannot connect to the 5 GHz network. The laptops do not show the 5 GHz SSIDs, which are different that the 2.4 GHz SSIDs. Existing devices can connect to the 5 GHz SSIDs with no difficulty. What is the likely problem?

• A. Interference from no-Wi-Fi sources
• B. Faulty drivers
• C. DoS attack
• D. Interference from other WLANs

Answer: D

NEW QUESTION 2
You were previously onsite at XYZ’s facility to conduct a pre-deployment RF site survey. The WLAN has been deployed according to your recommendations and you are onsite again to perform a post-deployment validation survey.
When performing this type of post-deployment RF site survey voice over Wi-Fi, what is an action that must be performed?

• A. Spectrum analysis to locate and identify RF interference sources.
• B. Frequency-band hopping analysis to detect improper RF channel implementations.
• C. Protocol analysis to discover channel use on neighboring APs.
• D. Application analysis with an active phone call on an VoWiFi handset.

Answer: A

NEW QUESTION 3
When using an RF splitter to connect one transceiver to sector antennas loss is incurred. What is this loss called?

• A. Conversion loss
• B. Intentional loss
• C. Through loss
• D. Active loss

Answer: C

NEW QUESTION 4
ABC Company is planning a point-to-multipoint bridge deployment with standalone (autonomous) 802.11 bridge units. 802.1X/EAP will be used for bridge authentication. A Linux-based RADIUS server will be used for authentication. What device in the bridge implementation acts as the 802.11X Authenticator?

• A. All non-root bridges
• B. The root bridge
• C. The Ethernet switch
• D. The RADIUS server

Answer: C

NEW QUESTION 5
When antenna gain is reported in dBI, the gain of the antenna is compared to what theoretical antenna?

• A. Yagl
• B. Dipole
• C. Rubber ducky
• D. Isotropic radiator

Answer: D

Explanation:
https://www.cwnp.com/forums/posts?postNum=292616

NEW QUESTION 6
You are configuring an access point to use channel 128. What important fact should be considered about this channel?

• A. It is a 22 MHz channel so it will overlap with the channels above and below it
• B. It is a 2.4 GHz frequency band 40 MHz channel, so it should not be used
• C. It is a channel that is unsupported by most access points
• D. It is a channel that likely requires DFS when used

Answer: D

NEW QUESTION 7
When implementing PoE, what role is played by a switch?

• A. PD
• B. PSE
• C. Midspan injector
• D. Power splitter

Answer: B

NEW QUESTION 8
When considering data rates available in HT and VHT PHY 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 drives
• C. The guard interval
• D. The height of the antennas

Answer: C

Explanation:
Reference https://arxiv.org/pdf/1702.03257.pdf

NEW QUESTION 9
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

Answer: B

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

NEW QUESTION 10
You are reporting on the RF environment in your facility. The manager asks you do describe the noise floor noted on 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.

Answer: C

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

NEW QUESTION 11
An 802.11 WLAN transmitter that emits a 50 mW signal is connected to a cable with 3 dB of loss. The cable is connected to an antenna with 16 dBi of gain.
What is the EIRP power output?

• A. 2 W
• B. 250 mW
• C. 1000 mW
• D. 500 mW

Answer: C

NEW QUESTION 12
You are the network administrator for ABC Company. Your manager has recently attended a wireless security seminar. The seminar speaker taught that a wireless network could be hidden from potential intruders if you disable the broadcasting of the SSID in Beacons and configured the access points not to respond to Probe Request frames that have a null SSID field.
Your manager suggests implementing these security practices. What response should you give to this suggestion?

• A. Any tenants in the same building using advanced penetration testing tools will be able to obtain the SSID by exploiting WPA EAPOL-Key exchange
• B. This poses an additional risk of exposing the WPA key.
• C. Any 802.11 protocol analyzer can see the SSID in clear text in frames other than Beacons frame
• D. This negates any security benefit of trying to hide the SSID in Beacons and Probe Response frames.
• E. To improve security by hiding the SSID, the AP and client stations must both be configured to remove the SSID from association request and response frame
• F. Most VLAN products support this.
• G. This security practice prevents manufacturers’ client utilities from detecting the SSI
• H. As a result, the SSID cannot be obtained by attackers, except through social engineering, guessing, or use of a WIPS.

Answer: B

NEW QUESTION 13
What statement about the IEEE 802.11-2016 QoS facility is true?

• A. 802.11 QoS is achieved by giving high priority queues a statistical advantage at winning contention.
• B. Four 802.1p user priorities are mapped to eight 802.11 transmit queues.
• C. 802.11 control frames are assigned to the 802.11 EF priority queue.
• D. When the Voice queue has frames awaiting transmission, no data will be transmitted from the Best Effort queue.

Answer: A

NEW QUESTION 14
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

Answer: D

NEW QUESTION 15
What is the final step in an effective troubleshooting process?

• A. Document the results
• B. Disable the WLAN
• C. Notify the users of problem resolution
• D. Verify the solution

Answer: A

NEW QUESTION 16
You are planning for PoE in a standard office deployment. Which one of these devices is least likely to be a PoE PD?

• A. Video camera
• B. Access point
• C. VoIP phone
• D. Ethernet switch

Answer: D

NEW QUESTION 17
You have received a report of poor wireless connections on the third floor of a building under your administration. Three individuals have reported the problem. Apparently, the connections are reposting a strong signal, but the users cannot access the Internet. With the problem identified, what is the next logical step in the troubleshooting process?

• A. Perform corrective actions
• B. Discover the scale of the problem
• C. Create a plan of action or escalate the problem
• D. Verify the solution

Answer: A

NEW QUESTION 18
When replacing the antenna of a WLAN device with a similar antenna type that has a higher passive gain, what antenna characteristic will decrease?

• A. Range
• B. Beam width
• C. Active gain
• D. Receive sensitivity

Answer: B

NEW QUESTION 19
A WLAN is implemented using wireless controllers. The APs must locate the controllers when powered on and connected to the network. Which one of the following methods is commonly used to locate the controllers by the APs?

• A. DHCP
• B. GRE
• C. NTP
• D. SNMP

Answer: A

Explanation:
Reference
https://books.google.com.pk/books?id=YEW0DAAAQBAJ&pg=SA7-PA9&lpg=SA7-PA9&dq=methods+is+co

NEW QUESTION 20
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