BraindumpsIT CWNA-108 dumps & CWNA Certification Sure Practice with 123 Questions
New CWNA-108 Exam Questions| Real CWNA-108 Dumps
CWNP CWNA-108 certification exam is an industry-leading certification that demonstrates the skills and knowledge required to manage and troubleshoot wireless networks. CWNA-108 exam is designed to test the candidate's proficiency in wireless networking technologies and their ability to implement and maintain wireless networks. The CWNP CWNA-108 certification is a vendor-neutral certification that is recognized globally by employers in the IT industry.
NEW QUESTION # 43
What non-standard WLAN solution attempts to give a longer transmission windows to devices with higher data rates then devise with lower data rates?
- A. RRM
- B. AirTime Fairness
- C. ARM
- D. Band Steering
Answer: B
NEW QUESTION # 44
You are evaluating a connection that states the data rate is 150 Mbps. What is the expected throughput of this connection?
- A. 150 Mbps because the data rate is equal to the throughput
- B. 54 Mbps because that is the actual maximum throughput of an 802.11 connection
- C. Less than 150 Mbps because of 802.11 overhead and contention
- D. More than 150 Mbps because of compression
Answer: C
NEW QUESTION # 45
What is the final step in an effective troubleshooting process?
- A. Disable the WLAN
- B. Document the results
- C. Verify the solution
- D. Notify the users of problem resolution
Answer: B
NEW QUESTION # 46
You administer a small WLAN with nine access point. As a small business, you do not rum a RADIUS server and use WPA2-Personal for security. Recently, you changed the passphrase for WPA2-personal in all Aps and clients. Several users are now reporting the inability to connect to the network at time and it is constrained to one area of the building. When using scanner, you see that the AP covering that area is online
- A. The clients are improperly configured
- B. The AP that covers the problem area has failed
- C. The AP that covers the problem area requires a firmware update
- D. The AP that covers the problem area is improperly configured
Answer: A
Explanation:
Explanation
This is because the passphrase for WPA2-Personal is case-sensitive and must match exactly on both the AP and the client. If the passphrase is entered incorrectly on the client, the client will not be able to authenticate with the AP and connect to the network. The AP that covers the problem area is not likely to require a firmware update, fail, or be improperly configured, as it is online and works with other clients that have the correct passphrase. To troubleshoot this issue, you can check the passphrase settings on the clients and make sure they match with the AP. You can also try to reconnect the clients to the network or reboot them if necessary. For more information on how to configure WPA2-Personal on your router
NEW QUESTION # 47
What parameter of the client driver should be configured on a Windows computer to optimize moving from one AP to another within the ESS?
- A. Roaming threshold
- B. Band preference
- C. ESSID selection
- D. SSID selection
Answer: A
NEW QUESTION # 48
What cause of hidden nodes within a BSS would be more likely lead to an increase in collisions and retries?
- A. Data frames too large for the physical environment
- B. Large 802.11 cells with physically distributed stations
- C. Client stations broadcasting with too much power
- D. Access pointsbroadcasting with too little power
Answer: D
NEW QUESTION # 49
What 802.11 PHY uses available space in very low frequency ranges that is not in use at the time by broadcast video signals?
- A. TVHT
- B. DSSS
- C. DMG
- D. SIG
Answer: A
Explanation:
Explanation
TVHT stands for Television Very High Throughput and it is a PHY defined by the 802.11af amendment. It uses the TV white space (TVWS) spectrum in the VHF and UHF bands between 54 and 790 MHz, which are not in use by broadcast video signals at the time. It can provide long-range and low-power connectivity for WLAN devices.
NEW QUESTION # 50
When performing a validation survey for a Multiple Channel Architecture (MCA) system in a multi- tenant building with five floors, what aspect should you, as the surveyor, keep in mind?
- A. The omni-directional antennas of the access points should be oriented parallel to the floor to maximize the coverage pattern across as many floors as possible
- B. The channel reuse pattern should be three dimensional with the RF cell extending coverage of each access point to other floors
- C. The RF interference caused by passing airplanes supporting on-board Wi-Fi should be a prime consideration
- D. The Fresnel Zone is completely blocked between floors so each floor is considered a separate site survey
Answer: B
NEW QUESTION # 51
Lynne runs a small hotel, and as a value added service for her customers she 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. She wants to avoid this problem at her hotel.
What is an efficient and practical step that Lynne can take to decrease the likelihood of active attacks on her customers' wireless computers?
- A. Implement Network Access Control (NAC) and require antivirus and firewall software along with OS patches.
- B. Enable station-to-station traffic blocking by the access points in the hotel.
- C. Implement an SSL VPN in the WLAN controller that initiates after HTTPS login.
- D. Require EAP-FAST authentication and provide customers with a username/password on their receipt.
Answer: D
NEW QUESTION # 52
The center frequency of channel 1 in the 2.4 GHz band is 2.412 GHz (2412 MHz). What is the center frequency of channel 4?
- A. 2.417
- B. 2.413
- C. 2.427
- D. 2.422
Answer: C
Explanation:
Explanation
The center frequency of channel 4 in the 2.4 GHz band is 2.427 GHz (2427 MHz). The center frequency of a channel is the midpoint of its frequency range, where the signal strength is highest and most concentrated. The center frequency of channel 1 in the 2.4 GHz band is 2.412 GHz (2412 MHz), as given in the question. The center frequency of each subsequent channel is obtained by adding 5 MHz to the previous channel's center frequency, since the channels are spaced 5 MHz apart from each other in this band. Therefore, to find the center frequency of channel 4, we need to add 15 MHz (5 MHz x 3) to the center frequency of channel 1:
2.412 GHz + 0.015 GHz = 2.427 GHz
Alternatively, we can use a formula to calculate the center frequency of any channel in the 2.4 GHz band:
Center frequency (GHz) = 2.407 + (0.005 x Channel number)
Using this formula for channel 4, we get:
Center frequency (GHz) = 2.407 + (0.005 x 4)
Center frequency (GHz) = 2.407 + 0.02
Center frequency (GHz) = 2.427 References: 1, Chapter 3, page 85; 2, Section 3.2
NEW QUESTION # 53
What phrase defines Equivalent Isotropically Radiated Power (EIRP)?
- A. The power output from the radio into the RF cable
- B. The highest RF signal strength that is transmitted from a given antenna
- C. Power supplied from the transmission line to the antenna input
- D. The power output from the radio after cable losses
Answer: B
NEW QUESTION # 54
What cipher suite is specified by the 802.11-2016 standard and is not deprecated?
- A. Extensible Authentication Protocol
- B. Wired Equivalent Privacy
- C. Temporal Key Integrity Protocol
- D. Counter Mode with CBC-MAC Protocol
Answer: D
NEW QUESTION # 55
In an 802.11n 2.4 GHz BSS, what prevents each station from using the full network data rate (e.g. 216.7 Mbps) for user data when multiple clients are actively exchanging data with the AP?
- A. All data frames must be acknowledged and the medium is shared
- B. Half of the bandwidth is allocated to uplink traffic and half to downlink traffic
- C. APs do not have sufficient wired connection speeds to the LAN, even at 1 Gbps connections, with
802.11n and earlier APs - D. Radio receiver hardware cannot process data is quickly as it can be transmitted
Answer: A
NEW QUESTION # 56
Which IEEE 802.11 physical layer (PHY) specification includes support for and compatibility with both ERP and HR/DSSS?
- A. VHT (802.11ac)
- B. OFDM (802.11a)
- C. HT (802.11n)
- D. DSSS (802.11-Prime)
Answer: C
NEW QUESTION # 57
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. Frequency-band hopping analysis to detect improper RF channel implementations
- C. Spectrum analysis to locate and identity RF Interference sources
- D. Protocol analysis to discover channel use on neighboring APs
Answer: C
NEW QUESTION # 58
Two co-located 802.11b/g/n APs can interfere with one another and cause contention and collisions, even when the two APs are operating on non-overlapping channels (e.g. 1 & 6).
What deployment flaw could cause this problem?
- A. A client station is using active scanning to probe for access points on multiple channels.
- B. The access points are mounted too closely to one another.
- C. Reflective objects in the area are causing significant multipath.
- D. The access points are not synchronized to the same NTP server.
Answer: B
NEW QUESTION # 59
In a long-distance RF link, what statement about Fade Margin is true?
- A. A Fade Margin is unnecessary on a long-distance RF link if more than 80% of the first Fresnelzone is clear of obstructions.
- B. Fade Margin is an additional pad of signal strength designed into theRF system to compensate for unpredictable signal fading.
- C. The Fade Margin is a measurement of signal loss through free space, and is a function of frequency and distance.
- D. The Fade Margin of a long-distance radio link should be equivalent to the receiver's antenna gain.
Answer: B
NEW QUESTION # 60
You are troubleshooting a client problem with a 2.4 GHz WLAN connection. The client is experiencing surprisingly low data rates during the work day. You analyze the workspace outside of business hours and detect a strong signal with a typical noise floor at the client location. During working hours, the user works with a laptop in the area and uses an external USB hard drive for continuous data access. The user also states that the laptop works as expected on her home network. The user working approximately 8 feet away from this client experiences no problems.
Based on this information, what is the likely cause of the problem?
- A. The laptop has a falling wireless adapter
- B. The AP is overloaded during the work day
- C. The drivers in the laptop are corrupt
- D. The external hard drive is USB 3.0 and is causing a significant increase in the noise floor when in use
Answer: B
NEW QUESTION # 61
When an ACK frame is not received by the transmitting STA, what is assumed?
- A. The receiver processed the frame, but did not respond with an ACK frame because 802.11w is enabled
- B. The frame was correctly delivered
- C. The receiver is offline
- D. The frame was not delivered and must be retransmitted
Answer: D
Explanation:
Explanation
An ACK (Acknowledgement) frame is a short control frame that is sent by the receiver of a data or management frame to confirm that the frame was received correctly. The ACK frame is sent after a SIFS (Short Interframe Space) interval, which is the shortest time gap between frames in 802.11. If the transmitter does not receive an ACK frame within a specified time, it assumes that the frame was not delivered and must be retransmitted. This is part of the 802.11 reliability mechanism that ensures reliable data delivery over an unreliable wireless medium . References: [CWNA-109 Study Guide], Chapter 5: IEEE 802.11 Medium Access, page 209; [CWNA-108 Study Guide], Chapter 5: IEEE 802.11 Medium Access, page 203.
NEW QUESTION # 62
A non-802.11 device is suspected of causing interference on the WLAN. You are not certain of the location or type of device. What is the best solution for locating this non-802.11 device?
- A. Access point spectrum analyzer
- B. Laptop-based spectrum analyzer with an omni-directional antenna
- C. Laptop-based spectrum analyzer with a directional antenna
- D. Laptop-based spectrum analyzer with an omni-directional antenna
Answer: C
NEW QUESTION # 63
What statement about 802.3. Clause 33 Power over Ethernet is true?
- A. Only midspan PSEs are supported.
- B. When using CAT5 cabling, you increase the maximum draw available to the PD over that available with CAT6.
- C. Only endpoint PSEs are supported.
- D. The lowest voltage drop is achieved when using CAT6 cable instead of CAT5 or CAT5e.
Answer: D
Explanation:
http://poe-world.com/Calculator/
NEW QUESTION # 64
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. Implementing Fast BSS Transition (FT) for roaming
- B. Increasing or decreasing the number of spatial streams in use by the client station and AP
- C. Implementation of several other clients in the same BSS using 802.11g radios
- D. RF interference from more than 10 nearby Bluetooth transmitters
Answer: A
Explanation:
Explanation
Implementing Fast BSS Transition (FT) for roaming 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. FT is a feature that allows a client station to quickly switch from one AP to another within the same ESS (Extended Service Set) without having to re-authenticate and re-associate with each AP. This reduces the latency and packet loss that may occur during roaming, thus improving the user experience and maintaining the application layer throughput. FT is defined in the IEEE 802.11r amendment and is also known as Fast Roaming or Fast Secure Roaming. References: , Chapter 9, page 367; , Section 6.3
NEW QUESTION # 65
When implementing PoE, what role is played by a switch?
- A. PO
- B. PSE
- C. Power splitter
- D. Midspan injector
Answer: B
NEW QUESTION # 66
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CWNP CWNA-108 Exam Topics:
| Section | Weight | Objectives |
|---|---|---|
| WLAN Troubleshooting | 10% | 1. Describe and apply common troubleshooting tools used in WLANs
2. Identify and troubleshoot common wireless issues
|
| WLAN Network Architecture and Design Concepts | 15% | 1. Describe and implement Power over Ethernet (PoE) 802.3af, 802.3at, 802.3bt
2. Define and describe differences, advantages and constraints of the different wireless LAN architectures
3. Describe design considerations for common deployment scenarios in wireless such as coverage requirements, roaming considerations, throughput, capacity and security
4.Demonstrate awareness of common proprietary features in wireless networks.
5. Determine and configure required network services supporting the wireless network
|
| Radio Frequency (RF) Technologies | 15% | 1. Define and explain the basic characteristics of RF and RF behavior
2. Apply the basic concepts of RF mathematics and measurement
3. Identify RF signal characteristics as they relate to antennas.
4. Explain and apply the functionality of RF antennas, antenna systems, and accessories available
|
| WLAN Protocols and Devices | 20% | 1. Describe the components and functions that make up an 802.11 wireless service set
2. Define terminology related to the 802.11 MAC and PHY
3. Identify and explain the MAC frame format
4. Identify and explain the purpose of the three main 802.11 frame types
5. Explain the process used to locate and connect to a WLAN
6. Explain 802.11 channel access methods
7. Explain 802.11 MAC operations
8. Describe features of, select, and install WLAN devices, control, and management systems
|
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