Wireless interview questions part 8
Wireless interview questions part 8
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Total Questions: 20
1. __________ switching is most commonly used in systems that require 'real-time' communications, such as voice and live media transmissions.
Correct Answer is : Circuit
2. Which one of the following does not use circuit switching for transmissions?
Correct Answer is : E-mail
3. This spread-spectrum signal structuring technique uses amplitude modulation to combine the waveforms of the data and carrier signals.
Correct Answer is : Direct-sequence
4. A __________ infrared transmission must have a clear, unobstructed transmission path between the transmitter and receiver.
Correct Answer is : Directed
5. The radio communication spectrum is divided into bands based on ______.
Correct Answer is : Frequency
6. Microwaves use ________ propagation
Correct Answer is : Line-of-sight
7. Multiplying the frequency of an electromagnetic wave travelling through air by its wavelength will always yield _________.
Correct Answer is : The speed of light
8. The type of propagation used in radio communication is highly dependent on the ________ of the signal.
Correct Answer is : Frequency
9. High-frequency radio waves use ________ propagation
Correct Answer is : Sky
10. Radio communication frequencies range from ___________.
Correct Answer is : 3 KHz to 300 GHz
11. Which of the following wireless transmission phenomenon cause ISI?
Correct Answer is : Multipath propagation
12. What is the modulation method used with 802.11a PHY?
Correct Answer is : OFDM
13. On which 802.11x topology are frames forwarded between access points within the same network?
Correct Answer is : ESS
14. Which of the following IEEE 802.11 standards does not define a PHY layer?
Correct Answer is : 802.11i
15. Which of the following IEEE 802.11 standards supports data rates of 100 Mbps?
Correct Answer is : 802.11n
16. What term is used to represent the physical layer of an 802.11x standard?
Correct Answer is : PHY
17. What is the current designation for the original IEEE 802.11 standard?
Correct Answer is : 802.11 Legacy
18. What is the term used to represent the IEEE 802.11 layer that controls access to the medium?
Correct Answer is : MAC
19. What is the 802.11b topology that arranges wireless stations in a peer-to-peer network?
Correct Answer is : Ad-hoc
20. What networking structure do the 802.11 standards define?
Correct Answer is : WLAN
