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This set of Wireless Sensor Networks (WSN) Multiple Choice Questions & Answers (MCQs) focuses on Wireless Sensor Networks Wsn Set 5

Q1 | Similarities between WSNs and MANETs networks is.
  • nodes are densely deployed
  • the nodes communicate each other using multi-hop communication
  • topology changes very frequently
  • have global unique identification for nodes
Q2 | In which network access point is not required?
  • ad hoc network
  • infrastructure network
  • both a and b
  • none of the above
Q3 | As the number of nodes___________, every node spends almost all of its time forwarding packets of other nodes
  •   decreases
  • increases
  • constant
  • none of the above
Q4 | In wireless sensor networks, some of the information defining the objective function and constraints is available only at___________
  • compile time
  •   run time
  •    ideal time
  •   setup time
Q5 | To ensure the ___________of the system, the communication and computation should be localized to relevant sensors only
  • responsiveness
  • scalability
  • both a and b
  • neither a nor b
Q6 | Networking allows geographical distribution of the sensor nodes and their placement close to signal sources
  • does not depend on signal source
  • statement is correct
  • irrelavant corelation
  • away from signal source
Q7 | Within the coverage range, communication is done by__________
  • multicast
  • broadcast
  • unicast
  • all of the above
Q8 | ___________sub-layer manages access to the physical network medium, and its fundamental goal is to reduce or avoid packet collisions in the medium
  • mac
  • llc
  • application
  • session
Q9 | Following characteristics of wireless sensor networks point to the need for a specialized MAC protocol
  • the issues of fairness of the node level are much less important than overall application performance
  • most sensor nodes are idle much of the time
  • in-network processing can greatly improve bandwidth utilization
  • all of above
Q10 | Following MAC protocols have been developed for wireless voice and data communication networks
  • tdma
  • fdma
  • cdma
  • all of above
Q11 | The main goal of the ___________is to reduce energy waste caused by idle listening, collisions, overhearing and control overhead
  • s-mac protocol
  • ieee802.15.4 standard
  • a and b
  • none of these
Q12 | The S-MAC protocol includes following major components
  • periodic listen and sleep
  • collision avoidance
  • overheating avoidance
  • all of above
Q13 | In the S-MAC protocol, ___________is designed to reduce energy consumption during the long idle time when no sensing events happen, by turning off the radio periodically
  • message passing
  • periodic listen and sleep
  • topology control
  • link control
Q14 | Examples of data attributes may include
  • node\s location
  • node\s type of sensors
  • certain range of values in a certain type of sensed data
  • all of above
Q15 | It may be more economical to use a smaller transmission radius for nodes in areas of high node density, w/o sacrificing adequate network connectivity. This is the issue of___________
  • topology control
  • traffic control
  • protocol control
  • link control
Q16 | This describes how the Ethernet protocol regulates communication among connection points.
  • carrier sense multiple access/collision detect
  • discontinuous transmission
  • aggregator
  • wait and response
Q17 | 802.11 wireless networking uses what method as the media access method?
  • csma/cd
  • cts/rts
  • csma/ca
  • cscd/ca
Q18 | ____________ assigns a unique number to each IP network adapter called the MAC address.
  • media access control
  • metro access control
  • metropolitan access control
  • both b and c above
Q19 | In ________ each station sends a frame whenever it has a frame to send.
  • pure aloha
  • slotted aloha
  • both (a) and (b)
  • neither (a) nor (b)
Q20 | In pure ALOHA, the vulnerable time is ______ the frame transmission time.
  • the same as
  • two times
  • three times
  • none of the above
Q21 | In __________, each station is forced to send only at the beginning of the time slot.
  • pure aloha
  • slotted aloha
  • both (a) and (b)
  • neither (a) nor (b)