[Feb-2024] CWNP CWNA-108 DUMPS WITH REAL EXAM QUESTIONS
2024 New Lead1Pass CWNA-108 PDF Recently Updated Questions
NEW QUESTION # 39
You are managing a wireless access point in autonomous mode using the Web based interface.
You capture traffic during this management task and notice that you can see the HTML code of the Web pages used for access point management. What error in administration could be the cause of this security concern?
- A. IPSec is not in use for the management connection as recommended
- B. HTTP is in use instead of HTTPS
- C. A VPN with the AP is not established
- D. WPA2 is disabled on the WLAN
Answer: B
NEW QUESTION # 40
What statement about the IEEE 802.11-2016 QoS facility is true?
- A. Four 802.1p user priorities are mapped to eight 802.11 transmit queues.
- B. 802.11 control frames are assigned to the 802.11 EF priority queue.
- C. When the Voice queue has frames awaiting transmission, no data will be transmitted from the Best Effort queue.
- D. 802.11 QoS is achieved by giving high priority queues a statistical advantage at winning contention.
Answer: D
Explanation:
Explanation
802.11 QoS is achieved by giving high priority queues a statistical advantage at winning contention. 802.11 QoS is based on the Enhanced Distributed Channel Access (EDCA) mechanism, which defines four access categories (ACs) for different types of traffic: Voice, Video, Best Effort, and Background. Each AC has its own transmit queue and contention parameters, such as Arbitration Interframe Space (AIFS), Contention Window (CW), and Transmission Opportunity (TXOP). These parameters determine how long a station has to wait before transmitting a frame and how long it can occupy the channel. Higher priority ACs have shorter AIFS, smaller CW, and longer TXOP, which means they have more chances to access the channel and send more data than lower priority ACs. However, this does not guarantee that higher priority ACs will always win the contention, as there is still a random backoff process involved. Therefore, 802.11 QoS is a statistical service that provides different levels of service quality based on traffic categories. References: , Chapter 10, page 403; , Section 6.1
NEW QUESTION # 41
What primary metric of scanning can stations use to select the best AP for connectivity to the desired BSS?
- A. FCS errors in frames transmitted to and from the AP.
- B. Signal strength of AP beacons received.
- C. PING latency when testing against an Internet server.
- D. Throughput speed in Mbps.
Answer: B
NEW QUESTION # 42
A dual-band 802.11ac AP must be powered by PoE. As a class 4 device, what power level should be received at the AP?
- A. 15.4 W
- B. 12.95 W
- C. 25.5 W
- D. 30 W
Answer: C
Explanation:
Explanation
PoE has different standards that define different power levels for PSEs and PDs. The original standard, IEEE
802.3af, defines two classes of PSEs: Class 3 (15.4 W) and Class 4 (30 W). The newer standard, IEEE 802.3at, also known as PoE+, defines four classes of PSEs: Class 0 (15.4 W), Class 1 (4 W), Class 2 (7 W), and Class 3 (12.95 W). The power level received at the PD is always lower than the power level provided by the PSE, due to cable resistance and power dissipation. The IEEE standards specify the minimum power level that must be received at the PD for each class of PSE. For a Class 4 PSE, the minimum power level received at the PD is
25.5 W910. References: CWNA-109 Study Guide, Chapter 7: Power over Ethernet (PoE), page
295; CWNA-108 Study Guide, Chapter 7: Power over Ethernet (PoE), page 289.
NEW QUESTION # 43
You are troubleshooting a client issue on a Windows laptop. The laptop can see and connect to 2.4 GHz APs, but is does not even see 5 GHz APs. While evaluating the issue, you determine that this problem is happening for all of the laptops of this model in the organization. Several other tablets connect on channel 48 and channel 52 in the same work areas. What is the likely problem?
- A. The antennas in the laptop have insufficient gain to detect the 5 GHz signals.
- B. The clients are configured to use WPA and 5 GHz channels only support WPA2.
- C. The client drivers are faulty and should be upgraded.
- D. The access points are configured to disallow 5 GHz.
Answer: A
NEW QUESTION # 44
Option 43 must be configured to allow access points to locate controller. In what network service should this option be configured?
- A. LDAP
- B. RADIUS
- C. DHCP
- D. DNS
Answer: C
NEW QUESTION # 45
What fact is true regarding controllers and Aps in a split-MAC architecture?
- A. With 802.1X/EAP security, the AP acts as the supplicant and the controller acts as the authenticator
- B. Management and data frames must be processed locally by the AP, while control frames are sent to the controller
- C. An IP tunnel is established between the AP and controller for AP management and control functions
- D. Using centralized data forwarding, frames leaving the Aps are never tagged Ethernet frames with VLAN identifiers
Answer: C
NEW QUESTION # 46
You are evaluating access points for use in the 5 GHz frequency band. What PHY supports this band and supports 80 MHz channels?
- A. HT
- B. OFDM
- C. VHT
- D. ERP
Answer: C
Explanation:
Explanation
VHT stands for Very High Throughput, which is a physical layer (PHY) specification that supports the 5 GHz frequency band and supports 80 MHz channels. VHT is used by the IEEE 802.11ac standard, which is also known as Wi-Fi 5. VHT allows for higher data rates and more spatial streams than the previous HT (High Throughput) PHY, which is used by the IEEE 802.11n standard, also known as Wi-Fi 4. HT supports the 2.4 GHz and 5 GHz bands, but only supports up to 40 MHz channels12 The other options are not correct because:
ERP (option C) stands for Extended Rate PHY, which is a physical layer specification that supports the
2.4 GHz frequency band and supports up to 20 MHz channels. ERP is used by the IEEE 802.11g standard, which is also known as Wi-Fi 3. ERP allows for higher data rates than the previous DSSS (Direct Sequence Spread Spectrum) PHY, which is used by the IEEE 802.11b standard, also known as Wi-Fi 234 OFDM (option D) stands for Orthogonal Frequency Division Multiplexing, which is a modulation technique that divides a signal into multiple subcarriers that are spaced orthogonally to each other.
OFDM is not a physical layer specification, but a common feature of many PHY specifications, including ERP, HT, and VHT. OFDM allows for higher spectral efficiency and robustness against multipath interference than the previous CCK (Complementary Code Keying) modulation technique used by DSSS34
NEW QUESTION # 47
When implementing PoE, what role is played by a switch?
- A. PSE
- B. PO
- C. Midspan injector
- D. Power splitter
Answer: A
NEW QUESTION # 48
Which IEEE 802.11 physical layer (PHY) specification includes support for and compatibility with both ERP and HR/DSSS?
- A. OFDM (802.11a)
- B. DSSS (802.11-Prime)
- C. HT (802.11n)
- D. VHT (802.11ac)
Answer: C
NEW QUESTION # 49
What wireless networking term describes the increase of RF energy in an intentional direction with the use of an antenna?
- A. Beam Digression
- B. Directed Radiation
- C. Passive Gain
- D. Active Amplification
Answer: C
Explanation:
Explanation
Passive Gain is the increase of RF energy in an intentional direction with the use of an antenna. It is achieved by focusing the same amount of power into a smaller area, resulting in a higher power density and a stronger signal. Passive Gain does not require any additional power or amplification, but rather depends on the antenna's physical characteristics, such as size, shape, and orientation. Passive Gain is also expressed in decibels (dB) and is related to the antenna's beamwidth and directivity. References: 1, Chapter 2, page 63; 2, Section 2.3
NEW QUESTION # 50
What are two channel modes specified by the 802.11n (High Throughput) PHY? (Choose 2)
- A. 40/80 MHz
- B. 20/40 MHz
- C. 80 MHz
- D. 20 MHz
- E. 160 MHz
- F. 22 MHz
Answer: B,D
NEW QUESTION # 51
The IEEE 802.11-2016 standard requires VHT capable devices to be backward compatible with devices using which other 802.11 physical layer specification (PHY)?
- A. DSSS
- B. OFDM
- C. ERP-PBCC
- D. HR/DSSS
Answer: B
NEW QUESTION # 52
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. Receive sensitivity
- B. Channel occupied
- C. Protocols utilized
- D. Airtime utilization
Answer: D
Explanation:
Explanation
Airtime Utilization is a per-channel statistic that defines what percentage of the channel is currently being used, and what percentage is therefore free. Airtime usage can come from: Data traffic to and from client devices. Interference from WiFi and non-WiFi sources. Management overhead from APs and client devices.
https://wyebot.com/2019/06/06/understanding-airtime-utilization/
NEW QUESTION # 53
The OSI model is a 7-layer model for understanding the functions of a communication system.
What OSI sublayers are specifically addressed by the IEEE 802.11-2012 standard? (Choose 2)
- A. PPDU
- B. Transport
- C. MAC
- D. Network
- E. IP
- F. PLCP
Answer: C,F
NEW QUESTION # 54
What statement about 802.3. Clause 33 Power over Ethernet is true?
- A. Only midspan PSEs are supported.
- B. Only endpoint PSEs are supported.
- C. When using CAT5 cabling, you increase the maximum draw available to the PD over that available with CAT6.
- 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 # 55
You have been tasked with creating a wireless link between two buildings on a single campus.
The link must support at least 150 Mbps data rates.
What kind of WLAN technology role should you deploy?
- A. Access BSS
- B. Wireless bridging
- C. IBSS
- D. WPAN
Answer: B
Explanation:
https://docs.netgate.com/pfsense/en/latest/wireless/bridges.html
https://www.lifewire.com/wireless-bridging-explained-816563
NEW QUESTION # 56
You are troubleshooting a problem with a new 802.11ax AP. While the AP supports four spatial streams, most clients are only achieving maximum data rates of 150 Mbps. What is the likely cause?
- A. Non-Wi-Fi interference in the channel
- B. The clients are 802.11n devices
- C. The clients are only two stream 802.11ax clients
- D. Contention caused by an overlapping BSS
Answer: B
Explanation:
Explanation
The clients are 802.11n devices. 802.11n devices can only support a maximum of four spatial streams, and the maximum data rate for a single spatial stream is 150 Mbps. Therefore, if most clients are only achieving 150 Mbps, it means they are using only one spatial stream, which is typical for 802.11n devices. To achieve higher data rates, the clients would need to support more spatial streams, which is possible with 802.11ax devices12.
The other options are not correct because they do not explain why most clients are only achieving 150 Mbps. Option B is incorrect because two stream 802.11ax clients can achieve data rates of up to 574 Mbps in a
20 MHz channel1. Option C is incorrect because contention caused by an overlapping BSS would affect all clients, not just most of them, and it would also reduce the throughput, not the data rate. Option D is incorrect because non-Wi-Fi interference in the channel would also affect all clients, not just most of them, and it would also cause errors and retransmissions, not lower data rates.
References: 1: CWNA-108 Official Study Guide, page 144 2: 802.11ax data rates
NEW QUESTION # 57
What is the final step in an effective troubleshooting process?
- A. Document the results
- B. Notify the users of problem resolution
- C. Disable the WLAN
- D. Verify the solution
Answer: A
Explanation:
Explanation
The final step in an effective troubleshooting process is to document the results. Documentation is essential for keeping track of the problem history, the actions taken, the solutions implemented, and the outcomes achieved.
Documentation can also help to prevent future problems, improve best practices, and provide feedback for improvement. Documentation should include relevant information such as problem description, symptoms, root cause analysis, resolution steps, verification methods, and lessons learned. References: [CWNP Certified Wireless Network Administrator Official Study Guide: Exam CWNA-107], page 513; [CWNA: Certified Wireless Network Administrator Official Study Guide: Exam CWNA-106], page 483.
NEW QUESTION # 58
What feature of 802.1 lax (HE) may impact design decisions related to AP placement and the spacing between same-channel BSS cells (3SAs) because it is designed to reduce overlapping BSS contention?
- A. 6 GHz band support
- B. uplink MU-MIMO
- C. BSS Color
- D. TWT
Answer: C
NEW QUESTION # 59
A dual-band 802.11ac AP must be powered by PoE. As a class 4 device, what power level should be received at the AP?
- A. 15.4 W
- B. 12.95 W
- C. 25.5 W
- D. 30 W
Answer: C
NEW QUESTION # 60
You are troubleshooting a controller-based AP that is unable to locate the controller. DHCP is not use and the controller is located at 10.10.10.81/24 while the AP is on the 10.10.16.0/24 network. What should be inspected to verify proper configuration?
- A. DNS
- B. NTP
- C. AP hosts file
- D. BOOTH
Answer: A
Explanation:
Explanation
What should be inspected to verify proper configuration is DNS. DNS stands for Domain Name System and is a service that resolves hostnames to IP addresses. In a controller-based AP deployment, DNS can be used to help the AP locate the controller by using a predefined hostname such as CISCO-CAPWAP-CONTROLLER or aruba-master. The AP sends a DNS query for this hostname and receives an IP address of the controller as a response. Therefore, if DNS is not configured properly or if there is no DNS entry for the controller hostname, the AP may not be able to locate the controller. NTP, BOOTP, and AP hosts file are not relevant for this scenario. References: [CWNP Certified Wireless Network Administrator Official Study Guide: Exam CWNA-107], page 374; [CWNA: Certified Wireless Network Administrator Official Study Guide: Exam CWNA-106], page 364.
NEW QUESTION # 61
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