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CWNA-106 Exam Dumps : Certified Wireless Network Administrator

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Certified Wireless Network Administrator Questions and Answers

Question 1

Which IEEE 802.11 physical layer (PHY) specifications include support for and compatibility of both OFDM and HR/DSSS? (Choose 2)

Options:

A.

HR/DSSS (802.11b)

B.

OFDM (802.11a)

C.

ERP (802.11g)

D.

HT (802.11n)

E.

CCK (802.11b)

F.

VHT (802.11ac)

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Question 2

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?

Options:

A.

MU-MIMO

B.

Inverse square law

C.

Path spread phenomenon

D.

Fresnel zone thinning

E.

Ohm’s law

Question 3

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

Options:

A.

802.11a and 11n use six (6) “pilot” subcarriers as a reference for the receiver to detect frequency and phase shifts of the signal.

B.

802.11a/g/n OFDM includes several combinations of modulation and coding to achieve data rates from 1-600 Mbps.

C.

With 802.11a OFDM, 16-QAM provides either 48 or 54 Mbps data rates, depending upon coding rates.

D.

802.11ac VHT-OFDM utilizes 256-QAM, which increases the data rate significantly over 64-QAM available in HT-OFDM.

E.

In 802.11a OFDM, fifty-six (56) subcarriers are used as parallel symbol transmission paths to carry data.