CWNA-107 Free Questions – Certified Wireless Network Administrator V12.02 – PassQuestion Free Questions To Test Online

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

FCS

Preamble

MAC header

PHY header

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

VLAN ID

BSSID

Device ID

SSID

3. 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

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

Implementing Fast BSS Transition (FT) for roaming

RF interference from more than 10 nearby Bluetooth transmitters

4. 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?

WPAN

Ad-hoc

BSS

IBSS

5. Which IEEE 802.11 physical layer (PHY) specification includes support for and compatibility with both ERP and HR/DSSS?

VHT (802.11ac)

OFDM (802.11a)

DSSS (802.11-Prime)

HT (802.11n)

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

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

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

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

OFDM modulation is used only in 5 GHz 802.11 transmissions.

7. You are implementing a VHT-capable AP.
Which one of the following channels is available in the 802.11¬2016 standard that was not available before the ratification of 802.11 ac?

153

161

144

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

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

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

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

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

9. What best describes WPA2 in relation to 802.11 wireless networks?

WPA2 is specified in the 802.11 standard as implementing CCMP/AES.

WPA2 is the standard that defines security for WLANs.

WPA2 is a certification created by the Wi-Fi Alliance that validates devices correctly implement CCMP/ AES.

WPA2 is the second version of WPA and it enhances security through the use of TKIP instead of WEP.

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?

MU-MIMO capabilities of the bridges

Receive antenna gain

Transmit power

Operating frequency

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

Horizontal and vertical beamwidth are calculated at the point where the main lobe decreases power by 3 dB.

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

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

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

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

Dish and grid

Dipole and yagi

Grid and sector

Patch and panel

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

Directed Radiation

Active Amplification

Passive Gain

Beam Digression

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

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

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

A Fade Margin is unnecessary on a long-distance RF link if more than 80% of

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

15. 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?

23 dBm

26 dBm

13 dBm

10 dBm

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

The frame was correctly delivered

The frame was not delivered and must be retransmitted

The receiver is offline

The receiver processed the frame, but did not respond with an ACK frame because 802.11w is enabled

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

Free Space Path Loss

Receiving station’s radio sensitivity

Transmitting station’s output power

Receiving station’s output power

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

Fewer MCS values in the MCS table

Excessive VSWR

Increased amplitude of the RF signal

Increased range of the RF signal

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

Reflection

Refraction

Scattering

Warping

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

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

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

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

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

CWNA-107 Free Questions – Certified Wireless Network Administrator V12.02

CWNA-107 Free Questions – Certified Wireless Network Administrator V12.02

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