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Certified Wireless Network Administrator Question and Answers

Certified Wireless Network Administrator

Last Update Nov 30, 2025
Total Questions : 125

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Questions 1

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?

Options:

A.  

SOHO

B.  

Residential

C.  

High density

D.  

Standard office

Discussion 0
Questions 2

802. 11ax (HE) introduces Resource Units that can be used to allow communications with multiple devices at the same time, on the same channel, in the same BSS. What feature of 802.1 lax provides this functionality?

Options:

A.  

6 GHz support

B.  

TWT

C.  

Wi-Fi-LTE

D.  

OFDMA

Discussion 0
Questions 3

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?

Options:

A.  

30 W

B.  

12.95 W

C.  

25.5 W

D.  

15.4 W

Discussion 0
Questions 4

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?

Options:

A.  

All clients implement single spatial stream radios

B.  

The clients are all 802.11n STAs or lower

C.  

The AP is improperly configured to use only 40 MHz of the 80 MHz allocated bandwidth

D.  

The short guard interval is also enabled

Discussion 0
Questions 5

What terms accurately complete the following sentence?

The IEEE 802.11-2016 standard specifies mandatory support of the _______________ cipher suite for Robust Security Network Associations, and optional use of the ________________ cipher suite, which is designed for use with pre-RSNA hardware and is deprecated.

Options:

A.  

802.1X/EAP, WEP

B.  

CCMP, TKIP

C.  

TLS, SSL

D.  

RC5, RC4

Discussion 0
Questions 6

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

Options:

A.  

Refraction

B.  

Warping

C.  

Scattering

D.  

Reflection

Discussion 0
Questions 7

What primary metric of scanning can stations use to select the best AP for connectivity to the desired BSS?

Options:

A.  

Signal strength of AP beacons received.

B.  

PING latency when testing against an Internet server.

C.  

Throughput speed in Mbps.

D.  

FCS errors in frames transmitted to and from the AP.

Discussion 0
Questions 8

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

Options:

A.  

Directed Radiation

B.  

Beam Digression

C.  

Passive Gain

D.  

Active Amplification

Discussion 0
Questions 9

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?

Options:

A.  

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

B.  

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

C.  

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

D.  

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

Discussion 0
Questions 10

You are attempting to explain RF shadow and how it can cause lack of coverage. What common building item frequently causes RF shadow and must be accounted for in coverage plans?

Options:

A.  

Wooden doors

B.  

Carpeted floors

C.  

Elevators

D.  

Cubicle partitions

Discussion 0
Questions 11

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?

Options:

A.  

Increasing or decreasing the number of spatial streams in use by the client station and AP

B.  

Implementing Fast BSS Transition (FT) for roaming

C.  

Implementation of several other clients in the same BSS using 802.11g radios

D.  

RF interference from more than 10 nearby Bluetooth transmitters

Discussion 0
Questions 12

What is an advantage of using WPA3-Personal instead of WPA2-Personal as a security solution for 802.11 networks?

Options:

A.  

WPA3-Personal, also called WPA3-SAE, uses an authentication exchange and WPA2-Personal does not

B.  

WPA3-Personal, also called WPA3-SAE, uses a stronger authentication exchange to better secure the network

C.  

WPA3-Personal, also called WPA3-SAE, uses AES for encryption and WPA2-Personal does not

D.  

WPA3-Personal, also called WPA3-SAE, uses a better encryption algorithm than WPA2-Personal

Discussion 0
Questions 13

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

Options:

A.  

An IP tunnel is established between the AP and controller for AP management and control functions.

B.  

Using centralized data forwarding, APs never tag Ethernet frames with VLAN identifiers or 802.1p CoS.

C.  

With 802.1X/EAP security, the AP acts as the supplicant and the controller acts as the authenticator.

D.  

Management and data frame types must be processed locally by the AP, while control frame types must be sent to the controller.

Discussion 0
Questions 14

The IEEE 802.11-2012 standard requires VHT capable devices to be backward compatible with devices using which other 802.11 physical layer specifications (PHYs)?

Options:

A.  

OFDM

B.  

HR/DSSS

C.  

ERP-PBCC

D.  

DSSS-OFDM

Discussion 0
Questions 15

Which one of the following is not a factor considered when calculating the Link Budget for an outdoor point-to- point WLAN bridge link?

Options:

A.  

Operating frequency

B.  

MU-MIMO capabilities of the bridges

C.  

Receive antenna gain

D.  

Transmit power

Discussion 0
Questions 16

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

Options:

A.  

Preamble

B.  

MAC header

C.  

PHY header

D.  

FCS

Discussion 0
Questions 17

You are attempting to locate the cause of a performance problem in two WLAN cells in a mostly overlapping coverage area. You note that one AP is on channel 1 and the other is on channel 2. When you document your findings, what term do you use to describe the problem in this configuration?

Options:

A.  

CCC

B.  

Non-Wi-Fi interference

C.  

CCI

D.  

ACI

Discussion 0
Questions 18

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

Options:

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 frame was not delivered and must be retransmitted

D.  

The receiver is offline

Discussion 0
Questions 19

In a mesh BSS (MBSS), according to the 802.11 standard, what device connect the mesh to an Ethernet network?

Options:

A.  

Mesh Gate

B.  

Mesh Switch

C.  

Mesh Router

D.  

Mesh Portal

Discussion 0
Questions 20

When compared with legacy Power Save mode, how does VHT TXOP power save improve battery life for devices on a WLAN?

Options:

A.  

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

B.  

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

C.  

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

D.  

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

Discussion 0
Questions 21

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 voice over Wi-Fi, what is an action that must be performed?

Options:

A.  

Spectrum analysis to locate and identify RF interference sources.

B.  

Frequency-band hopping analysis to detect improper RF channel implementations.

C.  

Application analysis with an active phone call on an VoWiFi handset.

D.  

Protocol analysis to discover channel use on neighboring APs.

Discussion 0
Questions 22

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?

Options:

A.  

NTP issues

B.  

Hardware issues

C.  

IP routing issues

D.  

Captive portal issues

Discussion 0
Questions 23

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

Options:

A.  

Fresnel zone thinning

B.  

Ohm's law

C.  

Inverse square law

D.  

MU-MIMO

Discussion 0
Questions 24

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?

Options:

A.  

The clients are configured to use WPA and 5 GHz channels only support WPA2.

B.  

The client drivers are faulty and should be upgraded.

C.  

The antennas in the laptop have insufficient gain to detect the 5 GHz signals.

D.  

The access points are configured to disallow 5 GHz.

Discussion 0
Questions 25

Option 43 must be configured to allow access points to locate controllers. In what network service should this option be configured?

Options:

A.  

DNS

B.  

LDAP

C.  

DHCP

D.  

RADIUS

Discussion 0
Questions 26

A natural disaster has occurred in a remote area that is approximately 57 miles from the response team headquarters. The response team must implement a local wireless network using 802.11 WLAN access points. What is the best method, of those listed, for implementation of a network back-haul for communications across the Internet in this

scenario?

Options:

A.  

802.11 bridging to the response team headquarters

B.  

Cellular/LTE/5G

C.  

Turn up the output power of the WLAN at the response team headquarters

D.  

Temporary wired DSL

Discussion 0
Questions 27

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

Options:

A.  

Each AP responds in turn after preparing a probe response and winning contention.

B.  

For each probe request frame, only one AP may reply with a probe response.

C.  

Each AP checks with the DHCP server to see if it can respond and then acts accordingly.

D.  

After waiting a SIFS, all APs reply at the same time with a probe response.

Discussion 0
Questions 28

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?

Options:

A.  

The noise caused by elevators, microwave ovens, and video transmitters.

B.  

The extra energy radiated by access points and client devices beyond that intended for the signal.

C.  

The energy radiated by flooring materials that causes interference in the 2.4 GHz and 5 GHz bands.

D.  

The RF energy that exists in the environment from intentional and unintentional RF radiators that forms the baseline above which the intentional signal of your WLAN must exist.

Discussion 0
Questions 29

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

Options:

A.  

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

B.  

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

C.  

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

D.  

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

Discussion 0
Questions 30

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?

Options:

A.  

Use a 160 MHz channel on the 5 GHz radio

B.  

Use a 40 MHz channel on the 5 GHz radio

C.  

Install a second AP in the coverage area

D.  

Use a 40 MHz channel on the 2.4 GHz radio

Discussion 0
Questions 31

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?

Options:

A.  

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

B.  

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

C.  

The antennas in the laptops have been repositioned.

D.  

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

Discussion 0
Questions 32

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?

Options:

A.  

IPsec is not in use of the management connection as recommended

B.  

A VPN with the AP is not established

C.  

WPA2 is disabled on the WLAN

D.  

HTTP is in use instead of HTTPS

Discussion 0
Questions 33

Your consulting firm has recently been hired to complete a site survey for a company desiring an indoor coverage WI-AN. Your engineers use predictive design software for the task, but the company insists on a pre-design site visit.

What task should be performed as part of the pre-design visit to prepare for a predictive design?

Options:

A.  

Install at least one AP on each side of the exterior walls to test for co-channel interference through these walls

B.  

Collect information about the company's security requirements and the current configuration of their RADIUS and user database servers

C.  

Test several antenna types connected to the intended APS for use in the eventual deployment

D.  

Evaluate the building materials at the facility and confirm that the floor plan documents are consistent with the actual building

Discussion 0
Questions 34

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?

Options:

A.  

26 dBm

B.  

13 dBm

C.  

23 dBm

D.  

10 dBm

Discussion 0
Questions 35

What statement about 802.11 WLAN bridges is true?

Options:

A.  

WLAN bridges only work in the 2.4 GHz frequency band and they support only SISO communications

B.  

WLAN bridges must use a channel with acceptable SNR at both transceivers to maintain the desired data rate bi-directionally

C.  

WLAN bridges may support MIMO communications, but only if used in the 5 GHz frequency band

D.  

WLAN bridges must be implemented such that no interference occurs on the channel anywhere between the two endpoints used to establish the bridge

Discussion 0
Questions 36

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?

Options:

A.  

25 mW

B.  

250 mW

C.  

500 mW

D.  

1000 mW

Discussion 0
Questions 37

You must plan for POE in an office environment. Which one of these devices is least likely to be a POE PSE?

Options:

A.  

Midspan multi-port injector

B.  

Switch

C.  

VolP Phone

D.  

Midspan injector

Discussion 0