New 2021 CWNA-108 exam questions Welcome to download the newest Exam4PDF CWNA-108 PDF dumps (178 Q&As)
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NEW QUESTION 14
Which one of the following channels can be used for VHT transmissions?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION 15
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 for voice over Wi-Fi. what is an action that must be performed?
- A. Application analysis with an active phone call on a VoWiFi handset
- B. Protocol analysis to discover channel use on neighboring APs
- C. Spectrum analysis to locate and identity RF Interference sources
- D. Frequency-band hopping analysis to detect improper RF channel implementations
Answer: C
NEW QUESTION 16
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?
- A. Implementation of several other clients in the same BSS using 802.11g radios
- B. RF interference from more than 10 nearby Bluetooth transmitters
- C. Implementing Fast BSS Transition (FT) for roaming
- D. Increasing or decreasing the number of spatial streams in use by the client station and AP
Answer: C
NEW QUESTION 17
Lynne runs a small hotel, and as a value added service for his customers he has implemented a Wi-Fi hot-spot. Lynne has read news articles about how hackers wait at hot-spots trying to take advantage of unsuspecting users. He wants to avoid this problem at his hotel.
What is an efficient and practical step that Lynne can take to decrease the likelihood of active attacks on his customers' wireless computers?
- A. Require EAP-FAST authentication and provide customers with a username/password on their receipt.
- B. Implement an SSL VPN in the WLAN controller that initiates after HTTPS login.
- C. Enable station-to-station traffic blocking by the access points in the hotel.
- D. Implement Network Access Control (NAC) and require antivirus and firewall software along with OS patches.
Answer: C
NEW QUESTION 18
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. 1000 mW
- B. 25 mW
- C. 50 mW
- D. 250 mW
- E. 10 mW
Answer: A
NEW QUESTION 19
When considering data rates available in HT and VHT PJY devices, in addition to the modulation, coding, channel width, and spatial streams, what impacts the data rate according to the MCS tables?
- A. The guard interval
- B. The height of the antennas
- C. The Frequency band in use
- D. The client drivers
Answer: A
NEW QUESTION 20
An RF signal sometimes bends as it passes through some material other than free space. What is the term that describes this behavior?
- A. Warping
- B. Refraction
- C. Reflection
- D. Scattering
Answer: B
NEW QUESTION 21
What terms accurately complete the following sentence?
The IEEE 802.11-2012 standard specifies mandatory support of the ___________ cipher suite for Robust Security Network Associations, and optional use of the ___________ cipher suite, which is designed for use with pre-RSNA hardware.
- A. 802.1X/EAP, WEP
- B. CCMP, TKIP
- C. RC5, RC4
- D. TLS, SSL
Answer: B
NEW QUESTION 22
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?
- A. WPAN
- B. BSS
- C. Ad-hoc
- D. IBSS
Answer: B
NEW QUESTION 23
You administer a WLAN that offers a guest SSID of GUESTNWORK. User connect to the GUESTNWORK SSID, but report that they cannot browse the internet. The devices simply report no internet connection. What common problem causes this scenario?
- A. Captive portal issues
- B. Hardware issues
- C. NTP issues
- D. IP routing issues
Answer: D
NEW QUESTION 24
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 reporting 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: B
NEW QUESTION 25
What statement accurately describes the RF cables and connectors that are used in an
802.11 WLAN system?
- A. Two RF connectors of the same type (e.g. SMA), manufactured by different companies, may vary in specifications.
- B. Some RF connectorsdo not cause insertion loss.
- C. Large diameter RF cables cause greater loss than small diameter cables.
- D. 75 and 125 ohms are the typical impedances of 802.11 WLAN connectors.
Answer: A
NEW QUESTION 26
An IEEE 802.11 amendment is in the draft state. What impact does this draft amendment have on the 802.11 standard?
- A. Devices will be released based on the draft amendment and the draft amendment features are part of the standard.
- B. No impact: Draft amendments do not become part of the standard until a working group is formed.
- C. No impact: Until an amendment is ratified, it does not become part of the standard.
- D. The standard is changed to reflect the new capabilities as soon as amendment enters the draft stage.
Answer: C
NEW QUESTION 27
Which directional antenna types are commonly used by indoor Wi-Fi devices in a MIMO multiple spatial stream implementation?
- A. Patch and panel
- B. Dish and grid
- C. Dipole and yagi
- D. Grid and sector
Answer: A
NEW QUESTION 28
What security method is commonly used for VoIP handsets when the infrastructure does not support OKC or FT roaming?
- A. WPA2 -Personal
- B. WPA2-Enterprise with PEAP
- C. WPA2-Enterprise with EAP-TLS
- D. WPA2-Enterprise with EAP-TTLS
Answer: C
NEW QUESTION 29
What is always required to establish a high quality 2.4 GHz RF link at a distance of 3 miles (5 kilometers)?
- A. Accurate Earth Bulge calculations
- B. A minimum antenna gain of 11 dBi at both endpoints
- C. Grid antennas at each endpoint
- D. A Fresnel Zone that is at least 60% clear of obstructions
- E. Minimum output power level of 2 W
Answer: D
NEW QUESTION 30
You manage a WLAN with 100 802.1lac 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?
- A. All clients implement single spatial stream radios
- B. The short guard interval is also enabled
- C. The clients are all 802.11n STAs or lower
- D. The AP is improperly configured to use only 40 MHz of the 80 MHz allocated bandwidth
Answer: D
NEW QUESTION 31
As you prepare for a site survey in a multi-floor corporate office, you have learned about several wireless devices that support connection-oriented, real-time applications. These applications are sensitive to service interruptions and require excellent signal quality, low latency, and low loss.
For that reason, it is important to identify sources of RF interference as well as building characteristics that would cause RF blockage or dead spots.
What systems or environmental characteristics are most likely to cause interference or RF blockage and disrupt service for these applications? (Choose 2)
- A. Microwave ovens
- B. RFID chokepoints
- C. Elevator shafts
- D. Narrow hallways
- E. Workspace dividers
Answer: A,C
NEW QUESTION 32
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CWNA-108 exam questions from Exam4PDF dumps: https://www.exam4pdf.com/CWNA-108-dumps-torrent.html (178 Q&As)
Free 2021 CWNA Certification CWNA-108 dumps are available on Google Drive shared by Exam4PDF: https://drive.google.com/open?id=1XFrs-REuvzojBVd7tDCCDyf0rVL-Fv-P
