Wireless Sensor Networks Wsn Set 6
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This set of Wireless Sensor Networks (WSN) Multiple Choice Questions & Answers (MCQs) focuses on Wireless Sensor Networks Wsn Set 6
Q1 | In ________, a station monitors the medium after it sends a frame to see if the transmission was successful. If so, the station is finished. If, however, there is a collision, the frame is sent again.
- csma/ca
- csma/cd
- either (a) or (b)
- both (a) and (b)
Q2 | To avoid collisions on wireless networks, ________was invented.
- csma/ca
- csma/cd
- either (a) or (b)
- both (a) and (b)
Q3 | In _______, collisions are avoided through the use of three strategies: the interframe space, the contention window, and acknowledgments.
- csma/ca
- csma/cd
- either (a) or (b)
- both (a) and (b)
Q4 | In _______ methods, the stations consult one another to find which station has the right to send.
- random access
- controlled access
- channelization
- none of the above
Q5 | In _______ methods, a station cannot send unless it has been authorized by other stations.
- random access
- controlled access
- channelization
- none of the above
Q6 | In the ________ method, a station needs to make a reservation before sending data. Time is divided into intervals.
- reservation
- polling
- token passing
- none of the above
Q7 | In the ______ method, all data exchanges must be made through the primary device even when the ultimate destination is a secondary device.
- reservation
- polling
- token passing
- none of the above
Q8 | In the _______ method, the primary device controls the link; the secondary devices follow its instructions.
- reservation
- polling
- token passing
- none of the above
Q9 | In ______, each station is allocated a band to send its data. In other words, each band is reserved for a specific station, and it belongs to the station all the time.
- fdma
- tdma
- cdma
- none of the above
Q10 | In _______, the stations share the bandwidth of the channel in time.
- fdma
- tdma
- cdma
- none of the above
Q11 | In _____, each station is allocated a time slot during which it can send data. Each station transmits its data in its assigned time slot.
- fdma
- tdma
- cdma
- none of the above
Q12 | In _____, each station transmits its data in its assigned time slot.
- fdma
- tdma
- cdma
- none of the above
Q13 | W-CDMA is ____.
- wireless code division multiple access
- wideband code division multiple access
- wide code division multiple access
- web band code division multiple access
Q14 | You have 5 information signals and only one transmitter. What technique will help in transmitting all the 5 signals?
- frequency modulation
- multiplexing
- amplification
- amplitude modulation
Q15 | RTS/CTS period is called ( )
- waiting period
- contention period
- running period
- none of these
Q16 | Which is not a variant of S-MAC?
- timeout mac (tmac)
- dynamic sensor mac (dsmac)
- input-output mac (iomac)
- data gathering (dmac)
Q17 | 5. In ................ multiple access is achieved by allocating different time slots for the different users.
- tdma
- cdma
- fdma
- fgma
Q18 | A antenna which attempts to direct all its energy in a particular direction is called as a .............
- directional antenna
- one to one antenna
- propagation antenna
- single direction antenna
Q19 | Which of the FCC's RF bands operates in the frequency range of 2.4 GHz to 2.4835 GHz
- ism
- rfid
- soho
- unii
Q20 | What is the term used to identify the broadcast or generated electrical signals that can disrupt wireless communications?
- rfi
- rfid
- fcc
- ism
Q21 | Which one of the following devices rebroadcasts the signals it receives after conditioning them for increased strength and clarity?
- bridge
- repeater
- router
- gateway
Q22 | Wireless networks transmit using RF signals, which require a __________ to receive and transmit signals through the air.
- repeater
- router
- antenna
- remote
Q23 | Which one of the following RF band is allocated to the Industrial, Scientific and Medical industry?
- 4.9 ghz to 5.825 ghz
- 824 mhz to 849 mhz
- 174 mhz to 220 mhz
- 2.4 ghz to 2.4835 ghz