Pass Your CWNA Certification CWNA-108 Exam on Jan 13, 2022 with 178 Questions
CWNA-108 Free Exam Study Guide! (Updated 178 Questions)
NEW QUESTION 23
What statements about the beamwidth of an RF antenna are true?
- A. When antenna gain is lower, the beamwidth is also lower in both the horizontal and vertical dimensions.
- B. Vertical beamwidth is displayed (in degree) on the antenna's Azimuth chart.
- C. The beamwidth patterns on an antenna polar chart indicate the point at which the RF signal stops propagating.
- D. Horizontal and vertical beamwidth are calculated at the points in which the main lobe decreases power by 3 dB
Answer: D
NEW QUESTION 24
A dual-band 802-1 lac AP must be powered by PoE. As a class 4 device, what power level should be received at the AP?
- A. 25. 5W
- B. 30 W
- C. 15.4 W
- D. 12.95 W
Answer: C
NEW QUESTION 25
A WLAN transmitter that emits a 50 mW signal is connected to a cable with 3 dB loss.
If the cable is connected to an antenna with 9 dBi gain, what is the EIRP at the antenna element?
- A. 13 dBm
- B. 26 dBm
- C. 23 dBm
- D. 10 dBm
Answer: C
NEW QUESTION 26
What statement is true concerning the use of Orthogonal Frequency Division Multiplexing (OFDM) modulation method in IEEE 802.11 WLANs?
- A. OFDM was used by Frequency Hopping Spread Spectrum (FHSS) PHY devices.
- B. OFDM implements BPSK modulation to allow for data rates up to 7 Gbps.
- C. OFDM was first introduced in 802.11a and is used by the ERP, HT and VHT PHYs as well.
- D. OFDM modulation is used only in 5 GHz 802.11 transmissions.
Answer: C
Explanation:
Explanation
NEW QUESTION 27
Your manager asked you to locate a solution that allows for centralized monitoring of WLAN performance over time. He wants a single pane of glass for administration and monitoring of the solution. What do you recommend?
- A. AP-based spectrum analysis
- B. Overlay WLAN monitoring solution
- C. Laptop based spectrum analyzers
- D. laptop-based protocol analyzers
Answer: A
NEW QUESTION 28
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. Create a plan of action or escalate the problem
- B. Verify the solution
- C. Perform corrective actions
- D. Discover the scale of the problem
Answer: D
NEW QUESTION 29
In an 802.11 2.4 GHz system, what 22 MHz channels are considered non-overlapping?
- A. 1 and 5
- B. 2 and 8
- C. 7 and 11
- D. 4 and 6
Answer: D
NEW QUESTION 30
You are deploying a WLAN with the access points configured for 10 mW of output power on the 2.4 GHz radios and 20 mW of output power on the 5GHz radios. Some semi-directional antennas are also in use. What kind of deployment is described?
- A. Residential
- B. High density
- C. SOHO
- D. Standard office
Answer: C
Explanation:
Explanation/Reference:
NEW QUESTION 31
The network administrator at XYZ Company recently attended a training class on wireless security and realized that he should update the corporate security policy to address WLAN technology. The network administrator is listing the items that should be addressed in the security policy update, and has asked for your input.
What WLAN topics should be addressed by a company security policy? (Choose 3)
- A. User density planning and AP client association thresholds
- B. Theft prevention and data security of WLAN infrastructure devices
- C. Wired network performance analysis and baseline documentation
- D. Wireless intrusion monitoring and response procedures
- E. WLAN performance analysis baseline documentation
- F. Training of the IT staff on WLAN operational security
Answer: B,D,F
NEW QUESTION 32
What is always required to establish a high quality 2.4 GHz RF link at a distance of 3 miles (5 kilometers)?
- A. Minimum output power level of 2 watts
- B. Grid antennas at each endpoint
- C. A Fresnel Zone that is at least 60% clear of obstructions
- D. A minimum antenna gain of 11 dBi at both endpoints
Answer: C
NEW QUESTION 33
You are evaluating a connection that states the data rate is 150 Mbps. What is the expected throughput of this connection?
- A. 54 Mbps because that is the actual maximum throughput of an 802.11 connection
- B. More than 150 Mbps because of compression
- C. 150 Mbps because the data rate is equal to the throughput
- D. Less than 150 Mbps because of 802.11 overhead and contention
Answer: D
NEW QUESTION 34
A client complains of low data rates on his computer. When you evaluate the situation, you see that the signal strength is -84 dBm and the noise floor is -96 dBm. The client is an 802.11ac client and connects to an 802.11ac AP. Both the client and AP are 2x2:2 devices. What is the likely cause of the low data rate issue?
- A. Weak signal strength
- B. Lack of support for 802.11n
- C. Too few spatial streams
- D. CAT5e cabling run to the AP
Answer: A
Explanation:
Explanation/Reference:
NEW QUESTION 35
An RF signal sometimes bends as it passes through some material other than free space. What is the term that describes this behavior?
- A. Scattering
- B. Refraction
- C. Warping
- D. Reflection
Answer: B
NEW QUESTION 36
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. IBSS
- C. BSS
- D. Ad-hoc
Answer: C
Explanation:
Explanation/Reference:
NEW QUESTION 37
Return Loss is the decrease of forward energy in a system when some of the power is being reflected back toward the transmitter.
What will cause high return loss in an RF transmission system, including the radio, cables, connectors and antenna?
- A. An impedance mismatch between components in the RF system
- B. High output power at the transmitter and use of a low-gain antenna
- C. A Voltage Standing Wave Ratio (VSWR) of 1:1
- D. The use of cables longer than one meter in the RF system
Answer: A
NEW QUESTION 38
What statement about 802.11 WLAN performance is true?
- A. To get the best performance out of an AP, you should disable data rates of 72 Mbps and lower
- B. In most WLANs, no special skill or tuning is required to get peak performance
- C. WLANs perform better as more wireless clients connect with each AP
- D. In modern networks, both centralized and distributed data forwarding work well for most standard office deployments
Answer: A
NEW QUESTION 39
During a post-implementation survey, you have detected a non-802.11 wireless device transmitting in the area used by handheld 802.11g scanners. What is the most important factor in determining the impact of this non-
802.11 device?
- A. Channel occupied
- B. Airtime utilization
- C. Receive sensitivity
- D. Protocols utilized
Answer: B
NEW QUESTION 40
You are tasked with performing a throughput test on the WLAN. The manager asks that you use open source tools to reduce costs. What open source tool is designed to perform a throughput test?
- A. IxChariot
- B. iPerf
- C. Python
- D. PuTTy
Answer: C
NEW QUESTION 41
When antenna gain is reported in dBI, the gain of the antenna is compared to what theoretical antenna?
- A. Yagl
- B. Rubber ducky
- C. Isotropic radiator
- D. Dipole
Answer: C
Explanation:
https://www.cwnp.com/forums/posts?postNum=292616
NEW QUESTION 42
A natural disaster has occurred in a remote area that is approximately 40 miles from the response team headquarters. The response team must setup a local wireless network using 802.11 WLAN access points. What is the best method, of those listed, for implementation of network backhaul for communications across the Internet in this scenario?
- A. Cellular/LTE
- B. 802.11 bridging
- C. Temporary wired cable
- D. Temporary wired DSL
Answer: A
NEW QUESTION 43
What common feature of MDM solutions can be used to protect enterprise data on mobile devices?
- A. Onboarding
- B. Containerization
- C. Over-the-air registration
- D. Self-registration
Answer: A
NEW QUESTION 44
You are troubleshooting a problem with interference from a non-802.11 device. Given that the device is not a WLAN device, you cannot use a protocol analyzer and have chosen to use a spectrum analyzer. You want to view the signal from the interfering device over time to see the activity that is generating.
What common spectrum analyzer view should you use for this analysis?
- A. Waterfall/Spectrogram
- B. APs
- C. Real-time FFT
- D. Clients
Answer: A
NEW QUESTION 45
You are troubleshooting a problem with interference from a non-802.11 device. Given that the device is not a WLAN device, you cannot use a protocol analyzer and have chosen to use a spectrum analyzer. You want to view the signal from the interfering device over time to see the activity that is generating.
What common spectrum analyzer view should you use for this analysis?
- A. Waterfall/Spectrogram
- B. APs
- C. Real-time FFT
- D. Clients
Answer: A
Explanation:
Explanation
NEW QUESTION 46
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. Increasing or decreasing the number of spatial streams in use by the client station and AP
- B. RF interference from more than 10 nearby Bluetooth transmitters
- C. Implementation of several other clients in the same BSS using 802.11g radios
- D. Implementing Fast BSS Transition (FT) for roaming
Answer: D
NEW QUESTION 47
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The CWNP CWNA-108 test is the basis of enterprise networking skills within the entire certification plan for CWNP. It provides the foundation needed to earn the other certificates specializing in analysis, design, and network expertise. In its complete form, the CWNA means Certified Wireless Network Administrator.
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