Free CWNA-109 Practice Questions & Answers 2026 Part1 | Certified Wireless Network Administrator

What is appended to the end of each 802.11 data frame after the payload?

What authentication method is referenced in the 802.11-2016 and 802.11-2020 specifications and is recommended for robust WI-AN client security?

What statement about the beamwidth of an RF antenna is true?

What ID is typically mapped to an AP’s MAC address if a single BSS is implemented?

What is appended to the end of each 802.11 data frame after the payload?

You are using a site survey tool for post-implementation validation. You have installed the appropriate adapter driver and imported a floor plan. Now, you want to take the next step in proper tool use. What must you do before gathering survey data after the floor plan is imported?

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?

What facts are true regarding controllers and APs in a Split MAC architecture?

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?

When a client station sends a broadcast probe request frame with a wildcard SSID, how do APs respond?

What ID is typically mapped to an AP's MAC address if a single BSS is implemented?

In a long - distance RF link, what statement about Fade Margin is true?

Which IEEE 802.11 physical layer (PHY) specification includes support for and compatibility with both ERP and HR/DSSS?

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 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?

You are implementing a VHT-capable AP. Which one of the following channels is available in the802.11-2016 standard that was not available before the ratification of 802.11 ac?

What statement is true concerning the use of Orthogonal Frequency Division Multiplexing (OFDM) modulation method in IEEE 802.11 WLANs?

What is appended to the end of each 802.11 data frame after the payload?

When a client station sends a broadcast probe request frame with a wildcard SSID, how do APs respond?

What ID is typically mapped to an AP's MAC address if a single BSS is implemented?

You manage a WLAN with 100 802.11ac 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?

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? OFDMA is a new modulation scheme introduced in 802.11ax that allows multiple users to share the same channel by dividing it into smaller subchannels called resource units (RUs). This improves the efficiency and capacity of the WLAN by reducing contention and overhead. However, to use OFDMA, both the AP and the client must support 802.11ax and negotiate the parameters of the subchannel allocation.Therefore, the customer needs to upgrade the clients that require OFDMA to 802.11ax devices12. The other options are not correct because they do not reflect the reality of OFDMA.Option B is incorrect because OFDMA is a mandatory feature of 802.11ax for both downlink and uplink transmissions, and all 802.11ax APs must support it1. Option C is incorrect because OFDM and OFDMA are different modulation schemes, and OFDM does not allow multiple users to share the same channel.Option D is incorrect because 802.11ac devices cannot support OFDMA through driver upgrades, as they lack the hardware and firmware capabilities to do so2.

What can an impedance mismatch in the RF cables and connectors cause?

What is appended to the end of each 802.11 data frame after the payload?

What is appended to the end of each 802.11 data frame after the payload?

AS an RF wave propagates through space, the wave front experiences natural expansion that reduces its signal strength in any specific remote area. What describes the rate at which this expansion happens?

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 9dBi gain, what is the EIRP at the antenna element?

You administer a small WLAN with nine access points. As a small business, you do not run a RADIUS server and use WPA2-Personal for security and the APs are in autonomous mode. 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 times and it is constrained to one area of the building and those clients work properly elsewhere. When using a WLAN scanner, you see that the AP covering that area is online and has a strong signal. No other changes have been made to the environment and all access points are the same model. What is the likely problem?

You are troubleshooting a controller-based AP that is unable to locate the controller. DHCP is not used and the controller is located at 10.10.10.81/24 while the AP is on the 10.10.16.0/24 network. Of the listed options, what should be inspected to verify proper configuration?

Which directional antenna types are commonly used by indoor Wi-Fi devices in a MIMO multiple spatial stream implementation?

When a client station sends a broadcast probe request frame with a wildcard SSID, how do APs respond?

You are implementing a VHT-capable AP.Which one of the following channels is available in the 802.11-2016 standard that was not available before the ratification of 802.11 ac?

When a client station sends a broadcast probe request frame with a wildcard SSID, how do APsrespond?

What is the most effective method for testing roaming in relation to 802.11 VoIP handsets?

When an ACK frame is not received by the transmitting STA, what is assumed?

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?

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 power level at the Intentional Radiator?

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?

When an ACK frame is not received by the transmitting STA, what is assumed?

Which one of the following 802.11 PHYs is more likely to be used in an industrial deployment but not likely to be used in standard office deployments?