Free CWNA-109 Practice Questions & Answers 2026 Part3 | Certified Wireless Network Administrator

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?

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

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?

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?

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

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

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?

An RF signal sometimes bends as it passes through some material other than free space. What is the term that describes this behavior?

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

What is required when operating 802.11ax APs in the 6 GHz band using passphrase-based authentication?

You are reporting on the RF environment in your facility. The manager asks you to describe the noise floor noted in the report. Which of the following is the best explanation?

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

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

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

What wireless networking term describes the increase of RF energy in an intentional direction with the use of an antenna?

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

What best describes WPA2 in relation to 802.11 wireless networks?

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?

The BSA of an AP covers the area used by the sales and marketing department. Thirty-five stations operate in this space. The users indicate that they need more throughput and all stations are 5 GHz capable 802.11ac clients. The current AP configuration uses 20 MHz channels in both 2.4 GHz and 5 GHz. What is the least expensive solution available for increasing throughput for these users without implementing configuration options that are not recommended?

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

What statement describes the authorization component of a AAA implementation? Granting access to specific network services or resources according to a user profile describes the authorization component of a AAA implementation. AAA stands for Authentication, Authorization, and Accounting, which are three functions that are used to control and monitor access to network resources and services. Authentication is the process of verifying that a user is who he says he is, by using credentials such as username, password, certificate, token, or biometric data. Authorization is the process of granting access to specific network services or resources according to a user profile, which defines the user's role, privileges, and permissions. Accounting is the process of recording and reporting the usage of network services or resources by a user, such as the duration, volume, type, and location of the access.AAA can be implemented by using different protocols and servers, such as RADIUS, TACACS+, LDAP, Kerberos, or Active Directory.Reference:1, Chapter 11, page 449;2, Section 7.1

What factor does not influence the distance at which an RF signal can be effectively received?

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? iPerf is an open source tool that is designed to perform a throughput test on the WLAN. iPerf is a cross-platform command-line tool that can measure the bandwidth and quality of network links by generating TCP or UDP traffic between two endpoints. iPerf can run as either a server or a client mode, depending on whether it receives or sends traffic. iPerf can also report various metrics of network performance, such as throughput, jitter, packet loss, delay, and TCP window size. To perform a throughput test on the WLAN using iPerf, one device needs to run iPerf in server mode and another device needs to run iPerf in client mode. The devices need to be connected to the same WLAN network and have their IP addresses configured properly. The device running iPerf in client mode needs to specify the IP address of the device running iPerf in server mode as well as other parameters such as protocol, port number, duration, interval, bandwidth limit, packet size, etc. The device running iPerf in server mode will listen for incoming connections from the client device and send back acknowledgments or responses depending on the protocol used. The device running iPerf in client mode will send traffic to the server device according to the specified parameters and measure the network performance. The device running iPerf in client mode will display the results of the throughput test at the end of the test or at regular intervals during the test.The results can show the average, minimum, maximum, and instantaneous throughput of the network link, as well as other metrics such as jitter, packet loss, delay, and TCP window size.Reference:1, Chapter 7, page 287;2, Section 4.3

A client STA must choose the best AP for connectivity. As part of the evaluation, it must verify compatible data rates. What can the client STA use to verify that an AP supports the same data rates that it supports?

Which of the following is not an example of an RF signal?

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

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

An RF signal sometimes bends as it passes through some material other than free space. What is the term that describes this behavior?

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?

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

Which unit of measurement, as formally defined, is an absolute unit that is used to quantify received signal power levels on a logarithmic scale?

An RF signal sometimes bends as it passes through some material other than free space.What is the term that describes this behavior?

An IEEE 802.11 amendment is in the daft state. What impact does this draft amendment have on the802.11 standard?

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

What two ISM bands are used by microwave ovens, cordless home telephones, baby monitors, and wireless video cameras? (Choose two)

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 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?

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

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?

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 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?

An IEEE 802.11 amendment is in the daft state.What impact does this draft amendment have on the 802.11 standard?

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

An AP is advertised as a tri-band, 4x4:4, Wi-Fi 6, 802.11ax AP. Based on this information and assuming it is correctly advertised, what can be determined as certainly true about this AP?

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?