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CWNA-109 Online Practice Questions and Answers

Questions 4

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?

A. 25 mW

B. 250 mW

C. 500 mW

D. 1000 mW

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Questions 5

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. 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

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Questions 6

What factors will have the most significant impact on the amount of wireless bandwidth available to each station within a BSS? (Choose 2)

A. The number of clientstations associated to the BSS

B. The power management settings in the access point's beacons

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

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

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Questions 7

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

A. Dipole and yagi

B. Grid and sector

C. Patch and panel

D. Dish and grid

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Questions 8

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. TWT

B. BSS Color

C. uplink MU-MIMO

D. 6 GHz band support

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Questions 9

Your manager asked you to locate a solution that allows for centralized monitoring of WLAN performance over time. He wants a single pane of glass for administration and monitoring of the solution. What do you recommend?

A. Laptop-based spectrum analyzers

B. AP-based spectrum analysis

C. Overlay WLAN monitoring solution

D. Laptop-based protocol analyzers

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Questions 10

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

A. Operating frequency

B. MU-MIMO capabilities of the bridges

C. Receive antenna gain

D. Transmit power

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Questions 11

What statement about 802.11 WLAN performance is true?

A. In modem networks, both centralized and distributed data forwarding work well for most standard office deployments

B. In most WLANs, no special skill or tuning is required to get peak performance

C. WLANs perform better as more wireless clients connect with each AP

D. To get the best performance out of an AP, you should disable data rates of 72 Mbps and lower

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Questions 12

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?

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.

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Questions 13

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?

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

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Questions 14

You are deploying a WLAN monitoring solution that utilizes distributed sensor devices. Where should sensors be deployed for best results? Choose the single best answer.

A. In switching closets

B. Every 5 meters and alongside each AP

C. In critical areas where WLAN performance must be high

D. Above the plenum on each floor

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Questions 15

What statement about 802.3, Clause 33 Power over Ethernet is true?

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

B. Only endpoint PSEs are supported.

C. Only midspan PSEs are supported.

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

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Questions 16

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

A. Directed Radiation

B. Beam Digression

C. Passive Gain

D. Active Amplification

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Questions 17

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?

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

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

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

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

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Questions 18

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. The clients are 802.11n devices

B. The clients are only two stream 802.11ax clients

C. Contention caused by an overlapping BSS

D. Non-Wi-Fi interference in the channel

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Exam Code: CWNA-109
Exam Name: Certified Wireless Network Administrator
Last Update: Mar 18, 2025
Questions: 122 Q&As

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