Try Free CWNA Certification CWNA-108 Practice Exam Questions

test2022-04-21T06:34:34+00:00

The best way to pass your CWNA Certification CWNA-108 exam can be found on FreeTestShare. Certified Wireless Network Administrator (CWNA) understands standards and operations of 802.11 wireless networks. To assist all candidates, FreeTestShare offers 100% real CWNA-108 practice exam questions that will not only help you pass the CWNA-108 exam but will also make you an expert in technical knowledge, allowing you to operate in the industry at the highest level of excellence.

FreeTestShare offers this recently updated free CWNA-108 practice exam questions to help you know the exam topics and layout well. You can also download the CWNA-108 practice test here online.

Page 1 of 2

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

OFDM implements BPSK modulation to allow for data rates up to 7 Gbps.

OFDM was first introduced in 802.11a and is used by the ERP, HT and VHT PHYs as well.

OFDM modulation is used only in 5 GHz 802.11 transmissions.

OFDM was used by Frequency Hopping Spread Spectrum (FHSS) PHY devices.

2. 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?

Laptop-based spectrum analyzers

AP-based spectrum analysis

Overlay WLAN monitoring solution

Laptop-based protocol analyzers

3. An IEEE 802.11 amendment is in the daft state.

What impact does this draft amendment have on the 802.11 standard?

Devices will be released based on the draft amendment and the draft amendment features are part of the standard.

No impact: Until an amendment is ratified, it does not become part of the standard.

No impact: Draft amendments do not become part of the standard until a working group is formed.

The standard is changed to reflect the new capabilities as soon as an amendment enters the draft stage.

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

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

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

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

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

5. 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?

Receive sensitivity

Channel occupied

Airtime utilization

Protocols utilized

6. ABC Company is planning a point-to-multipoint outdoor bridge deployment with standalone (autonomous) 802.11 bridge units. 802.1X/EAP will be used for bridge authentication. A Linux-based RADIUS server will be used for authentication.

What device in the bridge implementation acts as the 802.1X Authenticator?

The Ethernet switch

The RADIUS server

All non-root bridges

The root bridge

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

Operating frequency

MU-MIMO capabilities of the bridges

Receive antenna gain

Transmit power

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

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

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

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

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

9. What cipher suite is specified by the 802.11-2016 standard and is not deprecated?

Wired Equivalent Privacy

Temporal Key Integrity Protocol

Counter Mode with CBC-MAC Protocol

Extensible Authentication Protocol

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

Increased range of the RF signal

Fewer MCS values in the MCS table

Increased amplitude of the RF signal

Excessive VSWR

Page 2 of 2

11. 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?

IPsec is not in use of the management connection as recommended

A VPN with the AP is not established

WPA2 is disabled on the WLAN

HTTP is in use instead of HTTPS

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

Horizontal and vertical beamwidth are calculated at the points where the main lobe decreases power by 3 d

The beamwidth patterns on an antenna polar chart indicate the point at which the RF signal stops propagating.

When antenna gain is lower, the beamwidth is also lower in both the horizontal and vertical dimensions.

Vertical beamwidth is displayed (in degrees) on the antenna’s Azimuth chart.

13. 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?

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

Implementing Fast BSS Transition (FT) for roaming

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

RF interference from more than 10 nearby Bluetooth transmitters

14. The requirements for a WLAN you are installing state that it must support unidirectional delays of less than 150 ms and the signal strength at all receivers can be no lower than -67 dBm.

What application is likely used that demands these requirements?

VoIP

E-Mail

FTP

RTLS

15. 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?

All clients implement single spatial stream radios

The clients are all 802.11n STAs or lower

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

The short guard interval is also enabled