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CWNA-109 Certified Wireless Network Administrator is now Stable and With Pass Result | Test Your Knowledge for Free

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CWNA-109 Practice Questions

Certified Wireless Network Administrator

Last Update 3 days ago
Total Questions : 125

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Question # 21

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
Question # 22

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
Question # 23

Return Loss is the decrease of forward energy in a system when some of the power is being reflected back toward the transmitter. What will cause high return loss in an RF transmission system, including the radio, cables, connectors and antenna?

Options:

A.  

The use of 50 ohm cables longer than one meter in the RF system

B.  

High output power at the transmitter and use of a low-gain antenna

C.  

A significant impedance mismatch between components in the RF system

D.  

A Voltage Standing Wave Ratio (VSWR) of 1:1

Discussion 0
Question # 24

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?

Options:

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

Discussion 0
Question # 25

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?

Options:

A.  

Ad-hoc

B.  

WPAN

C.  

BSS

D.  

IBSS

Discussion 0
Question # 26

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
Question # 27

You are implementing a multi-AP WLAN and fast secure roaming is essential. Which one of the following methods is an IEEE 802.11 standard method for fast roaming?

Options:

A.  

FT

B.  

OKC

C.  

Load balancing

D.  

Band steering

Discussion 0
Question # 28

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

Options:

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.

Discussion 0
Question # 29

What 802.11 network configuration would result in multiple stations broadcasting Beacon frames with the same BSSID but with different source addresses?

Options:

A.  

Multiple APs have been loaded with the same configuration from an image file.

B.  

A single AP supports multiple BSSs with different SSIDs.

C.  

An IBSS is used instead of a BSS.

D.  

An SCA network is in use.

Discussion 0
Question # 30

What statement about the IEEE 802.11-2016 QoS facility is true?

Options:

A.  

802.11 control frames are assigned to the 802.11 EF priority queue.

B.  

When the Voice queue has frames awaiting transmission, no data will be transmitted from the Best Effort queue.

C.  

802.11 QoS is achieved by giving high priority queues a statistical advantage at winning contention.

D.  

Four 802.1p user priorities are mapped to eight 802.11 transmit queues.

Discussion 0
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