 All RF Cafe Quizzes make great fodder for
employment interviews for technicians or engineers - particularly those who are
fresh out of school or are relatively new to the work world. Come to think of it,
they would make equally excellent study material for the same persons who are going
to be interviewed for a job. Bonne chance, Viel Glück, がんばろう,
buena suerte, удачи, in bocca al lupo, 행운을 빕니다,
ádh mór, בהצלחה, lykke til, 祝你好運.
Well, you know what I mean: Good luck!
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Cafe Quiz #39
 This
quiz is based on the information presented in Emerging Wireless Technologies and the Future Mobile Internet,
by Dipankar Raychaudhuri & Mario Gerla. Published by Cambridge university Press.
Note: Some of these books are available as prizes in the monthly
RF Cafe Giveaway.
1. According to a NSF Wireless
Mobile Planning Group report, how is the usage scenario for Individual Wireless Devices Interfacing with
the Internet classified? b) Mobile Computing. This is designated "Scenario A," and includes
cellular phones, PDAs, media players, digital cameras, or some type of combination consumer device. (see page 11)
2. According to a
NSF Wireless Mobile Planning Group report, how is
the usage scenario for Constellation of Wireless Devices classified? a) Ad hoc Nets This is
designated "Scenario B," and is motivated by a variety of settings in which multiple radio devices me be in close
physical proximity and can collaborate by forming an ad hoc network. (see page 11)
3. According to a
NSF Wireless Mobile Planning Group report, how is
the usage scenario for Pervasive Systems and Sensors Networks classified? c) Server Nets
This is designated "Scenario C," and refers to a broad class of systems involving embedded wireless devices
connected to the Internet. (see page 12) 4. What does the IEEE 802.11 WAVE
Task Group specification cover? b) Data exchange between high speed vehicles and roadside infrastructure
Wireless Access in Vehicular Environments (WAVE) uses the licensed 5.9 GHz ITS (Intelligent Transportation
Systems) band. (see page 23) 5. What is the function of a protocol's MAC
layer?
d) Brokering of channel access between contending devices The Media Access Control layer's job is to
facilitate the most efficient communications between connected devices (see page 58)
6. A Delay/Disruption Tolerant Network (DTN) might use what part of the network? d) All
the above In the DTN system, any fixed or mobile platform equipped with proper hardware can act as a
transponder to help form continuous wireless communications. (page 71) 7.
What is the name given to a scheme that uses interface components to translate data at the boundaries of large
networks?
c) Gluenet The term Gluenet refers to using all components of the DTN (see Q6) to provide coverage at teh
boundaries of major cells. (see page 84) 8. Which of these components might
make up a Wireless Sensor Network (WSN)? d) All the above Wireless Sensor Networks are an important
emerging class of embedded distributed systems that consist of low-power devices integrating computation, sensing,
and wireless communications. (see page 125) 9. What is a major limitation of
Software Defined Radio (SDR) in cognitive radio networks? a) Latency The significant delay and jitter
between radio hardware and the host CPU will impact a host-based cognitive radio network protocol's ability to
react quickly to the spectrum, and for the MAC layer to precisely control packet timing. (see page 182)
10. Which factor(s) is(are) unique to wireless environments versus wired
environments?
Wireless networks experience data transfer issues because of a continuously varying environment. (see page
287) |
