Wireless Technology Quiz 1

• Question 1
2 out of 2 points

64-QAM modulation alters which two of the following aspects of an RF signal?
Selected Answers: Phase
Amplitude

• Question 2
1 out of 1 points

In the 2.4-GHz band, the FCC limits the EIRP of a point-to-multipoint link to which one of the following maximum values?
Selected Answer: 36 dBm

• Question 3
2 out of 2 points

Which of the following wireless LAN standards use OFDM for transmissions?
(Choose all that apply.)
Selected Answers: 802.11a
802.11g

• Question 4
1 out of 1 points

Consider a scenario with a transmitter and a receiver that are separated by some distance.The transmitter uses an absolute power level of 20 dBm. A cable connects the transmitter to its antenna. The receiver also has a cable connecting it to its antenna. Each cable has a loss of 2 dB. The transmitting and receiving antennas each have a gain of 5 dBi. What is the resulting EIRP?
Selected Answer: +23 dBm

• Question 5
1 out of 1 points

The typical data rates of 1, 2, 5.5, and 11 Mbps can be supported by which one of the following modulation types?
Selected Answer: DSSS

• Question 6
1 out of 1 points

An 802.11n device can aggregate channels to which one of the following maximum widths?
Selected Answer: 40 MHz

• Question 7
1 out of 1 points

Which one of the following correctly specifies the maximum theoretical data rate of the 802.11b, 802.11a, and 802.11n standards, respectively?
Selected Answer: 11 Mbps, 54 Mbps, 600 Mbps

• Question 8
3 out of 3 points

Which of the following standards apply to wireless LAN operation in the 5-GHz band? (Choose multiple correct answers.)
IEEE 802.11-2012
IEEE 802.11a
IEEE 802.11n

• Question 9
1 out of 1 points

Which one of the following is the common standard that defines wireless LAN operation?
Which one of the following is the common standard that defines wireless LAN
operation?
IEEE 802.1
IEEE 802.1x
IEEE 802.11
IEEE 802.3
Selected Answer: IEEE 802.11

• Question 10
1 out of 1 points

OFDM offers data rates up to 54 Mbps, but DSSS supports much lower limits.Compared with DSSS, which one of the following does OFDM leverage to achieve its superior data rates?
Selected Answer: 48 subcarriers in a channel

• Question 11
1 out of 1 points

A transmitter is configured to use a power level of 17 mW. One day it is reconfigured to transmit at a new power level of 34 mW. How much has the power level increased in dB?
Selected Answer: 3 dB

• Question 12
1 out of 1 points

Which regulatory body allocated the 2.4-2.5 GHz band for industrial, scientific, and medical use?

Selected Answer: ITU-R

• Question 13
2 out of 2 points

Which of the following represent the frequency bands commonly used for wireless LANs? (Choose two.)
2.4 GHz
5 GHz

• Question 14
1 out of 1 points

Which one of the following specifies the correct list of non-overlapping channels for DSSS use in the 2.4-GHz band?
Selected Answer: 1, 6, 11

• Question 15
1 out of 1 points

Wireless LAN operation is defined in which one of the following standards?
Selected Answer: 802.11

• Question 16
1 out of 1 points

Which one of the following organizations certifies 802.11 interoperability?
Selected Answer: Wi-Fi Alliance

• Question 17
1 out of 1 points

A receiver picks up an RF signal from a distant transmitter. Which one of the following represents the best signal quality received? Example values are given in parentheses.
Selected Answer: High SNR (30 dBm), High RSSI (-30)

• Question 18
1 out of 1 points

A transmitter normally uses an absolute power level of 100 mW. Through the course of needed changes, its power level is reduced to 40 mW. What is the powerlevel change in dB?
Selected Answer: -4 dB

• Question 19
1 out of 1 points

Transmitter A has a power level of 1 mW, and transmitter B is 100 mW. Compare transmitter B to A using dB, and then identify the correct answer from the following choices.
Selected Answer: 20 dB

• Question 20
1 out of 1 points

The U-NU-1 band is used for which one of the following purposes?
Selected Answer: 5-GHz wireless LANs

• Question 21
1 out of 1 points

A 2×3 MIMO device correctly describes which one of the following?
Selected Answer: A device with two transmitters and three receivers

• Question 22
1 out of 1 points

Which one of the following standards can make use of multiple spatial streams on a transmitter and a receiver?
Selected Answer: 802.11n

• Question 23

Two transmitters are each operating with a transmit power level of 100 mW. When you compare the two absolute power levels, what is the result in dB?
Selected Answer: 0 dB