[Oct 27, 2026] CWNA-109 Sample with Accurate & Updated Questions [Q23-Q46]

Rate this post

[Oct 27, 2026] CWNA-109 Sample with Accurate & Updated Questions

CWNA-109 Exam Info and Free Practice Test | ExamcollectionPass

CWNP CWNA-109 Exam Overview:

Certification Vendor:	CWNP
Exam Name:	CWNP Certified Wireless Network Administrator (CWNA)
Exam Number:	CWNA-109
Exam Duration:	90 minutes
Passing Score:	70%
Exam Price:	USD 250
Related Certifications:	Certified Wireless Network Administrator (CWNA)
Real Exam Qty:	60
Certificate Validity Period:	3 years
Exam Format:	Multiple Choice, Multiple Select, Drag-and-Drop
Available Languages:	English
Sample Questions:	CWNP CWNA-109 Sample Questions
Exam Way:	Online (Proctored) or Authorized Testing Center
Pre Condition:	No formal prerequisites, but foundational networking knowledge recommended
Official Syllabus URL:	https://www.cwnp.com/certifications/cwna/

NO.23 What best describes WPA2 in relation to 802.11 wireless networks?

WPA2 is the standard that defines security for WLANs.

WPA2 is a certification created by the Wi-Fi Alliance that validates devices correctly implement CCMP/ AES.

WPA2 is the second version of WPA and it enhances security through the use of TKIP instead of WEP.

WPA2 is specified in the 802.11 standard as implementing CCMP/AES.

NO.24 You are performing a post-implementation validation survey. What basic tool can be used to easily locate areas of high co-channel interference?

Throughput tester

Laptop-based spectrum analyzer

Access point spectrum analyzer

Wi-Fi scanner

NO.25 You have implemented an 802.11ax WLAN for a customer. All APs are four stream HE APs. The customer states that it is essential that most of the clients can use the OFDMA modulation scheme. What do you tell the customer?

The clients that must support OFDMA must also be upgraded to 802.11ax

OFDMA is an optional feature of 802.11ax and most APs don’t even support it

All 5 GHz PHYs use OFDM modulation, so you will achieve OFDMA everywhere in 5 GHz

If the devices support 802.11ac, they can be updated to support OFDMA through driver upgrades

NO.26 When implementing PoE, what role is played by a switch?

PSE

Midspan injector

Power splitter

NO.27 What factors will have the most significant impact on the amount of wireless bandwidth available to each station within a BSS? (Choose 2)

The number of clientstations associated to the BSS

The power management settings in the access point’s beacons

The presence of co-located (10m away) access points on non-overlapping channels

The layer 3 protocol used by each station to transmit data over the wireless link

The factors that will have the most significant impact on the amount of wireless bandwidth available to each station within a BSS are:
* The number of client stations associated to the BSS
* The presence of co-located (10m away) access points on non-overlapping channels The number of client stations associated to the BSS affects the wireless bandwidth because each station shares the same channel and medium with other stations in the same BSS. The more stations there are, the more contention and collision there will be for the channel access, which reduces the throughput and efficiency of the wireless communication. The wireless bandwidth available to each station depends on how the access point allocates the channel resources and how the stations use the channel time. For example, if the access point uses a round-robin scheduling algorithm, each station will get an equal share of the channel time regardless of its data rate or traffic demand. However, if the access point uses a proportional fair scheduling algorithm, each station will get a share of the channel time that is proportional to its data rate and traffic demand, which may result in higher or lower bandwidth for different stations.
The presence of co-located (10m away) access points on non-overlapping channels affects the wireless bandwidth because even though they use different channels, they may still cause interference and noise to each other due to channel leakage or imperfect filtering. The interference and noise can degrade the signal quality and SNR of the wireless communication, which reduces the data rate and throughput of the wireless communication. The wireless bandwidth available to each station depends on how well the access point and the station can cope with the interference and noise from other channels. For example, if the access point and the station support dynamic frequency selection (DFS) or adaptive radio management (ARM), they can switch to a less congested channel or adjust their output power or antenna gain to avoid or minimize interference from other channels.
References: 1, Chapter 3, page 94; 2, Section 3.2

NO.28 You are a small business wireless network consultant and provide WLAN services for various companies.
You receive a call from one of your customers stating that their laptop computers suddenly started experiencing much slower data transfers while connected to the WLAN. This company is located in a multi- tenant office building and the WLAN was designed to support laptops, tablets and mobile phones. What could cause a sudden change in performance for the laptop computers?

The sky was not as cloudy that day as it typically is and the sun also radiates electromagnetic waves.

A new tenant in the building has set their AP to the same RF channel that your customer is using.

The antennas in the laptops have been repositioned.

A few of your customer’s users have Bluetooth enabled wireless headsets.

NO.29 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?

NTP

BOOTH

DNS

AP hosts file

NO.30 What security solution is deprecated in the 802.11 standard and should never be used in any modern WLAN deployment?

Shared Key Authentication

Open System Authentication

CCMP

AES

NO.31 What statement about 802.3, Clause 33 Power over Ethernet is true?

When using CAT5 cabling, you increase the maximum draw available to the PD over that available with CAT6.

Only endpoint PSEs are supported.

Only midspan PSEs are supported.

The lowest voltage drop is achieved when using CAT6 cable instead of Cat5 or CAT5e.

NO.32 When compared with legacy Power Save mode, how does VHT TXOP power save improve battery life for devices on a WLAN?

Legacy Power Save mode was removed in the 802.11ac amendment.

VHT TXOP power save allows the WLAN transceiver to disable more components when in a low power state.

VHT TXOP power save uses the partial AID in the preamble to allow clients to identify frames targeted for them.

VHT TXOP power save allows stations to enter sleep mode and legacy Power Save does not.

NO.33 What cipher suite is specified by the 802.11-2016 standard and is not deprecated?

Wired Equivalent Privacy

Temporal Key Integrity Protocol

Counter Mode with CBC-MAC Pro tocol

Extensible Authentication Protocol

NO.34 An RF signal sometimes bends as it passes through a material rather than around an obstacle.
What is the RF behavior that this statement best describes?

Diffraction

Refraction

Scattering

Reflection

NO.35 What security solution is required to be used in place of Open System Authentication for all open network 802.11 implementations in the 6 GHz band?

OWE

Kerberos

WPA3-Enterprise

WPA3-SAE

NO.36 The requirements for a WLAN you are installing state that it must support unidirectional delays of less than 150 ms and the signal strength at all receivers can be no lower than -67 dBm. What application is likely used that demands these requirements?

VoIP

E-Mail

FTP

RTLS

NO.37 In a long-distance RF link, what statement about Fade Margin is true?

A Fade Margin is unnecessary on a long-distance RF link if more than 80% of the first Fresnel zone is clear of obstructions.

The Fade Margin is a measurement of signal loss through free space and is a function of frequency and distance.

Fade Margin is an additional pad of signal strength designed into the RF system to compensate for unpredictable signal fading.

The Fade Margin of a long-distance radio link should be equivalent to the receiver’s low noise filter gain.

NO.38 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?

SOHO

Residential

High density

Standard office

NO.39 When using a spectrum to look for non Wi-Fi interference sources, you notice significant interference across the entire 2.4 GHz band (not on a few select frequencies) within the desktop area of a users workspace, but the interference disappears quickly after just 2 meters. What is the most likely cause of this interference?

USB 3 devices in the user’s work area

Bluetooth devices in the user’s work area

Excess RF energy from a nearby AP

Unintentional radiation from the PC power supply

USB 3 devices in the user’s work area are the most likely cause of this interference when using a spectrum analyzer to look for non-Wi-Fi interference sources. A spectrum analyzer is a tool that measures and visualizes the radio frequency activity and interference in the wireless environment. A spectrum analyzer can show the spectrum usage and energy levels on each frequency band or channel and help identify and locate the sources of interference. Interference is any unwanted signal that disrupts or degrades the intended signal on a wireless channel. Interference can be caused by various sources, such as other Wi-Fi devices, non-Wi-Fi devices, or natural phenomena. Interference can affect WLAN performance and quality by causing signal loss, noise, distortion, or errors. USB 3 devices are non-Wi-Fi devices that use USB 3.0 technology to transfer data at high speeds between computers and peripherals, such as hard drives, flash drives, cameras, or printers.
USB 3 devices can generate electromagnetic radiation that interferes with Wi-Fi signals in the 2.4 GHz band, especially when they are close to Wi-Fi devices or antennas. USB 3 devices can cause significant interference across the entire 2.4 GHz band (not on a few select frequencies) within the desktop area of a user’s workspace, but the interference disappears quickly after just 2 meters. This is because USB 3 devices emit broadband interference that affects all channels in the 2.4 GHz band with a high intensity near the source but a low intensity at a distance due to attenuation. The other options are not likely to cause this interference pattern when using a spectrum analyzer to look for non-Wi-Fi interference sources. Bluetooth devices in the user’s work area are non-Wi-Fi devices that use Bluetooth technology to communicate wirelessly between computers and peripherals, such as keyboards, mice, headphones, or speakers. Bluetooth devices can cause interference with Wi-Fi signals in the 2.4 GHz band, but they use frequency hopping spread spectrum (FHSS) technique that changes frequencies rapidly and randomly within a range of 79 channels. Therefore, Bluetooth devices do not cause significant interference across the entire 2.4 GHz band (not on a few select frequencies), but rather intermittent interference on some channels at different times. Excess RF energy from a nearby AP is not a non-Wi-Fi interference source but rather a Wi-Fi interference source that occurs when an AP transmits more power than necessary for its coverage area. Excess RF energy from a nearby AP can cause co- channel interference (CCI) with other APs or client devices that use the same channel within range of each other. CCI reduces performance and capacity because it causes contention and collisions on the wireless medium,

NO.40 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 2×2:2 devices. What is the likely cause of the low data rate issue?

Weak signal strength

CAT5e cabling run to the AP

Too few spatial streams

Lack of support for 802.11n

Weak signal strength is the likely cause of the low data rate issue for the client that has a signal strength of -84 dBm and a noise floor of -96 dBm. The client is an 802.11ac client and connects to an 802.11ac AP. Both the client and AP are 2×2:2 devices. Signal strength is the measure of how strong the RF signal is at the receiver.
Signal strength can affect the reliability and performance of the wireless connection, as well as the data rate and throughput of the traffic. The higher the signal strength, the better the signal quality and the higher the data rate. The lower the signal strength, the worse the signal quality and the lower the data rate.
The data rate of an 802.11ac connection depends on several factors, such as channel bandwidth, modulation and coding scheme (MCS), spatial streams, guard interval, and beamforming. However, these factors are also influenced by the signal strength, as they require a certain signal-to-noise ratio (SNR) to operate properly.
SNR is the ratio of the signal strength to the noise floor, which is the measure of the background noise or interference in the RF environment. The higher the SNR, the more robust and efficient the communication.
The lower the SNR, the more prone and vulnerable to errors and retries.
According to the CWNA Official Study Guide , Table 3.7, page 112, an 802.11ac connection with a channel bandwidth of 80 MHz, an MCS of 9, two spatial streams, a short guard interval, and no beamforming can achieve a maximum data rate of 867 Mbps. However, this data rate requires a minimum SNR of 30 dB to maintain a sufficient signal quality. If the signal strength is -84 dBm and the noise floor is -96 dBm, then the SNR is only 12 dB (-84 dBm – (-96 dBm) = 12 dB), which is far below the required SNR for this data rate.
Therefore, the data rate will drop significantly to match the lower SNR and signal quality.
To solve this problem, the signal strength should be increased to improve the SNR and data rate. This can be done by adjusting the output power or channel assignment of the AP or client, relocating or reorienting some APs or antennas to reduce attenuation or interference, updating or replacing some faulty oroutdated hardware or software components, etc. References: , Chapter 3, page 112; , Section 3.2

NO.41 You administer a WLAN that offers a guest SSID of GUESTNWORK. Users 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?

NTP issues

Hardware issues

IP routing issues

Captive portal issues

NO.42 What factor does not influence the distance at which an RF signal can be effectively received?

Receiving station’s radio sensitivity

Receiving station’s output power

Transmitting station’s output power

Free Space Path Loss

NO.43 What is required when operating 802.11ax APS in the 6 GHz band using passphrase-based authentication?

VHT PHY

HT PHY

SAE

CCMP

SAE (Simultaneous Authentication of Equals) is required when operating 802.11ax APs in the 6 GHz band using passphrase-based authentication. SAE is a secure and robust authentication method that is defined in the IEEE 802.11s amendment and is also known as WPA3-Personal or WPA3-SAE. SAE is based on a cryptographic technique called Dragonfly Key Exchange, which allows two parties to establish a shared secret key using a passphrase, without revealing the passphrase or the key to an eavesdropper or an attacker. SAE also provides forward secrecy, which means that if the passphrase or the key is compromised in the future, it does not affect the security of past communications. SAE is required when operating 802.11ax APs in the 6 GHz band using passphrase-based authentication because of the new regulations and standards that apply to this band. The 6 GHz band is a new frequency band that was opened for unlicensed use by the FCC and other regulatory bodies in 2020. The 6 GHz band offers more spectrum and less interference than the existing 2.4 GHz and 5 GHz bands, which can enable higher performance and efficiency for Wi-Fi devices. However, the 6 GHz band also has some restrictions and requirements that are different from the other bands, such as:
The 6 GHz band is divided into two sub-bands: U-NII-5 (5925-6425 MHz) and U-NII-7 (6525-6875 MHz). The U-NII-5 sub-band is subject to DFS (Dynamic Frequency Selection) rules, which require Wi- Fi devices to monitor and avoid using channels that are occupied by radar systems or other primary users. The U-NII-7 sub-band is not subject to DFS rules, but it has a lower maximum transmit power limit than the U-NII-5 sub-band.
The Wi-Fi devices that operate in the 6 GHz band are called 6E devices, which stands for Extended Spectrum. 6E devices must support 802.11ax technology, which is also known as Wi-Fi
6 or High Efficiency (HE). 802.11ax is a new standard that improves the performance and efficiency of Wi-Fi networks by using features such as OFDMA (Orthogonal Frequency Division Multiple Access), MU- MIMO (Multi-User Multiple Input Multiple Output), BSS Coloring, TWT (Target Wake Time), and HE PHY and MAC enhancements.
The 6E devices that operate in the 6 GHz band must also support WPA3 security, which is a new security protocol that replaces WPA2 and provides stronger encryption and authentication for Wi- Fi networks. WPA3 has two modes: WPA3-Personal and WPA3-Enterprise. WPA3-Personal uses SAE as its authentication method, which requires a passphrase to establish a secure connection between two devices. WPA3-Enterprise uses EAP (Extensible Authentication Protocol) as its authentication method, which requires a certificate or a credential to authenticate with a server.
Therefore, SAE is required when operating 802.11ax APs in the 6 GHz band using passphrase- based authentication because it is part of WPA3-Personal security, which is mandatory for 6E devices in this band.

NO.44 What 802.11 amendment provides Radio Resource Management (RRM) capabilities, allowing client stations to request neighbor reports from an AP to assist with roaming decisions?

802.11r

802.11k

802.11v

802.11e

NO.45 You are installing an AP to be used by 27 laptops. All laptops will connect on the 5 GHz frequency band. A neighbor network uses channels 1 and 6. What channel should be used for this AP and why?

Channel 6, because it is always best to use this channel

A 5 GHz channel, because channels 1 and 6 are 2.4 GHz channels they have no impact on the decision

Channel 1, because it is best to use the channel with the lowest frequency

Channel 11, because channels 1 and 6 are in use nearby

NO.46 You have implemented an 802.11ax WLAN for a customer. All APs are four stream HE APs. The customer states that it is essential that most of the clients can use the OFDMA modulation scheme.
What do you tell the customer?

The clients that must support OFDMA must also be upgraded to 802.11ax

OFDMA is an optional feature of 802.11ax and most APs don’t even support it

All 5 GHz PHYs use OFDM modulation, so you will achieve OFDMA everywhere in 5 GHz

If the devices support 802.11ac, they can be updated to support OFDMA through driver upgrades

CWNP CWNA-109 Exam Syllabus Topics:

Topic	Details
Topic 1	Radio Frequency (RF) Technologies: This topic explains the basic features and behavior of RF. It also discusses applying the basic concepts of RF mathematics and measurement. Lastly, the topic covers RF signal characteristics and the functionality of RF antennas.
Topic 2	WLAN Regulations and Standards: The topic discusses the roles of WLAN and networking industry organizations. It also addresses the concepts of various Physical Layer (PHY) solutions, spread spectrum technologies, and 802.11 WLAN functional concepts.
Topic 3	WLAN Network Architecture and Design Concepts: This topic deals with describing and implementing Power over Ethernet (PoE). Furthermore, the topic covers different wireless LAN architectures, coverage requirements, roaming considerations, and common proprietary features in wireless networks.
Topic 4	WLAN Protocols and Devices: It focuses on terminology related to the 802.11 MAC and PHY, the purpose of the three main 802.11 frame types, MAC frame format, and 802.11 channel access methods.
Topic 5	RF Validation and WLAN remediation: This topic covers RF interference, WLAN performance, the basic features of validation tools, and common wireless issues.