CWNA certification CWNA-106 free dumps download

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Share some CWNA Certification CWNA-106 exam questions and answers below.
When using an RF splitter to connect one transceiver to sector antennas loss is incurred. 
What is this loss called? 
A. Conversion loss 
B. Through loss 
C. Active loss 
D. Intentional loss 
Answer: B

What word describes the bending of an RF signal as it passes through a medium of a varying density from that of free space? 
A. Diffraction 
B. Reflection 
C. Refraction 
D. Diffusion 
E. Scattering 
Answer: C

What factors influence the distance that an RF signal can be effectively received? (Choose 3) 
A. Transmitting station’s power source 
B. Receiving station’s radio sensitivity 
C. Free Space Path Loss 
D. MAC layer encryption 
E. Transmitting station’soutput power 
F. Temperature in the Fresnel zone 
Answer: B,C,E

AP-1 is a 3x3:2 AP. STA-3 is a 3x3:3 client. 
What is the maximum number of spatial streams that can be used for a downlink HT-OFDM transmission from AP-1 to STA-3? 
A. One spatial stream, because the definition of the AP indicates that it is capable of only one spatial stream. 
B. Three spatial streams, because the definition of the client indicates that it is capable of only three spatial streams. 
C. Two spatial streams, because the definition of the AP indicates that it is capable of only two spatial streams. 
D. Three spatial streams, because the definition of the AP indicates that it is capable of only three spatial streams. 
Answer: C

ABC Company has just purchased a 6 dBi patch antenna. After performing some tests with the 6 dBi antenna, they have concluded that more antenna gain is needed to cover their outdoor courtyard. 
When choosing an antenna with higher gain, what other antenna characteristic will also always change? 
A. Fresnel Zone size 
B. Maximum input power 
C. Beamwidth 
D. Impedance 
E. VSWR Ratio 
Answer: C

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 
Answer: B

What HT technology requires MIMO support on both the transmitter and receiver? 
A. Spatial multiplexing 
B. Shot guard intervals 
C. Maximal ratio combining 
D. Orthogonal Frequency Division Multiplexing 
Answer: A

What can cause an excessively high VSWR (Voltage Standing Wave Ratio) in a WLAN RF transmission line? 
A. An impedance mismatch inthe RF cables and connectors 
B. Reflected direct current (DC) voltage on the main RF signal line 
C. Attenuation of the RF signal as it travels along the main signal path 
D. Crosstalk (inductance) between adjacent RF conductors 
Answer: A

What is the intended use for the WLAN hardware known as a pole or mast mount unit? 
A. Mounting a lightning arrestor to a grounding rod 
B. Mounting anomnidirectional antenna to a mast 
C. Mounting an RF amplifier to a dipole antenna 
D. Mounting a PoE injector to a perforated radome 
E. Mounting an access point to a site survey tripod 
Answer: B

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. The use of cables longer than onemeter in the RF system 
D. High output power at the transmitter and use of a low-gain antenna 
Answer: B

When replacing the antenna of a WLAN device with a similar antenna type that has a higher passive gain, what antenna characteristic will decrease? 
A. Beam width 
B. Range 
C. Active gain 
D. Receive sensitivity 
Answer: A

As an RF wave propagates through space, the wave front experiences natural expansion that reduces its signal strength in an area. 
What term describes the rate at which this expansion happens? 
A. MU-MIMO 
B. Inverse square law 
C. Fresnel zone thinning 
D. Ohm¡¯s law 
Answer: B

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 theRF 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 Fresnelzone 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. 
Answer: A

What can cause an excessively high VSWR (Voltage Standing Wave Ratio) in a WLAN RF transmission line? 
A. An impedance mismatch inthe RF cables and connectors 
B. Reflected direct current (DC) voltage on the main RF signal line 
C. Attenuation of the RF signal as it travels along the main signal path 
D. Crosstalk (inductance) between adjacent RF conductors 
Answer: A

You are selecting antennas for a WLAN operating in the 5 GHz frequency band. 
What specifications should be evaluated for an antenna before it is implemented in this WLAN system? (Choose 3) 
A. 802.11ad compatibility 
B. TPC support 
C. Impedance in Ohms 
D. Elevation Beamwidth 
E. Return Loss Rating 
F. Operating Frequencies 
Answer: C,D,F

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 
Answer: A,B,C

What factors influence the distance that an RF signal can be effectively received? (Choose 3) 
A. Transmitting station¡¯s power source 
B. Receiving station¡¯s radio sensitivity 
C. Free Space Path Loss 
D. MAC layer encryption 
E. Transmitting station¡¯soutput power 
F. Temperature in the Fresnel zone 
Answer: B,C,E

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. The use of cables longer than onemeter in the RF system 
D. High output power at the transmitter and use of a low-gain antenna 
Answer: B

Which unit of measurement is an absolute unit that is used to quantify power levels on a linear scale? 
A. dBm 
B. SNR 
C. RSSI 
D. VSWR 
Answer: A

What word describes the bending of an RF signal as it passes through a medium of a varying density from that of free space? 
A. Diffraction 
B. Reflection 
C. Refraction 
D. Diffusion 
E. Scattering 
Answer: C

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