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CWNA-106 Exam Dumps - Certified Wireless Network Administrator

Question # 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 EIRP power output?

A.

10 mW

B.

25 mW

C.

50 mW

D.

250 mW

E.

1000 mW

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Question # 5

You are implementing a VHT-capable AP. Which one of the following channels is available in the 802.11ac amendment to the 802.11-2012 standard, which was not available in the standard before this amendment?

A.

153

B.

144

C.

161

D.

56

E.

48

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Question # 6

To ease user complexity, your company has implemented a single SSID for all employees. However, the network administrator needs a way to control the network resources that can be accessed by each employee based on their department.

What WLAN feature would allow the network administrator to accomplish this task?

A.

SNMP

B.

VRRP

C.

RBAC

D.

IPSec

E.

WIPS

F.

WPA2

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Question # 7

A company has hired you to perform a pre-deployment site survey of their facility. During an interview, the network manager informs you that the new wireless network must use 5 GHz bands and OFDM, and VoWiFi handsets will be used extensively over the wireless network.

What items do you need to include in the RF site survey report? (Choose 2)

A.

A heat map demonstrating signal quality in areas where VoWiFi is supported.

B.

Codec types and sampling rates for each VoWiFi phone

C.

Security parameters and configuration steps for VoWiFi handsets.

D.

Test results from an active survey with a VoWiFi handset

E.

Results of OFDM versus ERP performance in each BSA

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Question # 8

What is a common feature of an 802.11 WLAN client utility? (Choose 2)

A.

Real-time retry monitor

B.

AP Signal strength meter

C.

Spectrum analyzer utility

D.

VLAN configuration

E.

Link statistics display

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Question # 9

Which antenna types are commonly used by indoor Wi-Fi devices in a MIMO diversity implementation? (Choose 2)

A.

Dipole

B.

Patch

C.

Dish

D.

Grid

E.

Sector

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Question # 10

The center frequency of channel 1 in the 2.4 GHz band is 2.412 GHz (2412 MHz).

What is the center frequency of channel 4?

A.

2.413 GHz

B.

2.417 GHz

C.

2.422 GHz

D.

2.427 GHz

E.

2.437 GHz

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Question # 11

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?

A.

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

B.

An impedance mismatch between components in the RF system

C.

Cross-polarization of the RF signal as it passes through the RF system

D.

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

E.

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

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Question # 12

What type of device often causes interference across 50% or more of the 2.4 GHz frequency band?

A.

Military radar

B.

Properly configured AP

C.

Microwave oven

D.

Wireless video camera

E.

WIPS sensor

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Question # 13

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

A.

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

B.

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

C.

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

D.

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

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Question # 14

Why is it recommended for a wireless network administrator to disable 1 Mbps and 2 Mbps data rates on the WLAN infrastructure? (Choose 2)

A.

To improve capacity in the BSS

B.

To reduce the size of the AP’s effective service area

C.

To prevent 802.11b devices from associating

D.

To maximize the range of the highest data rates

E.

To prevent VoWiFi multicast frames

F.

To enable support for long preambles

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Question # 15

In addition to throughput enhancements, what other improvements does a dual-band 802.11ac AP provide when compared with 802.11a/g APs? (Choose 2)

A.

Introduces “fast transition” roaming protocols for VoWiFi phones

B.

Better link reliability between 802.11a/b/g client devices and 802.11ac APs

C.

Improves service quality for real-time applications at greater distances

D.

Increases in receive sensitivity enhance RTLS location accuracy

E.

Stronger security with more robust encryption modes.

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Question # 16

In an 802.11 2.4 GHz system, what 22 MHz channels are considered non-overlapping? (Choose 2)

A.

Channels 5 and 10

B.

Channels 1 and 5

C.

Channels 3 and 7

D.

Channels 2 and 8

E.

Channels 8 and 11

F.

Channels 10 and 13

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Question # 17

What statement about 802.3-2012, Clause 33 Power over Ethernet is true?

A.

Up to 30 watts of power may be provided through an Ethernet cable.

B.

By using CAT3 cabling, you can increase the maximum draw available to the PD.

C.

When using CAT5 cabling, you decrease the maximum draw available to the PD.

D.

Only endpoint PSEs are supported.

E.

Only midspan PSEs are supported.

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Question # 18

What factors are taken into account when calculating the Link Budget of a point-to-point outdoor WLAN bridge link?

A.

Operating frequency

B.

Transmit antenna gain

C.

Transmit power

D.

Antenna height

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