3. The _____ layer is roughly equivalent to the MAC sub layer in bluetooth.
Correct : C. baseband
4. The Bluetooth network is called as
Correct : A. piconet
5. Bluetooth have ____ frequency.
Correct : B. 2.4 ghz
6. WiMAX provides you?
Correct : A. full duplex communication
7. This is the family of specifications for wireless local area networks (WLANs) developed by a working group of the Institute of Electrical and Electronics Engineers (IEEE).
Correct : B. 802.11
8. Which of the following refers to a communications specification that was approved in early 2002 by the Institute of Electrical and Electronics Engineers Standards Association (IEEE-SA) for wireless personal area networks (WPANs)?
Correct : B. 802.15
9. This is an industry specification that describes how mobile phones, computers, and PDAs can easily interconnect with each other using a short-range wireless connection.
Correct : A. bluetooth
10. This is a specification for a set of communication protocols to standardize the way that wireless devices can be used for Internet access.
Correct : A. wap
11. Piconets in bluetooth have a minimum of two and a maximum of ____________ Bluetooth peer devices.
Correct : C. eight
12. In IEEE 802.11, a ___ is made of stationary or mobile wireless stations and an optional central base station, known as the access point (AP).
Correct : B. bss
13. Bluetooth is a _______ technology that connects devices (called gadgets) in a small area.
Correct : B. wireless lan
14. In Bluetooth, multiple ________ form a network called a _________.
Correct : B. piconets: scatternet
15. IEEE has defined the specifications for a wireless LAN called _______, which covers the physical and data link layers.
Correct : C. ieee 802.11
16. A Bluetooth network consists of _____ primary device(s) and up to ____ secondary devices.
Correct : D. one; seven
17. In Bluetooth, the current data rate is ____Mbps
Correct : D. none of the above
18. In Bluetooth, the _______ layer is roughly equivalent to the Physical layer of the Internet model.
Correct : A. radio
19. In Bluetooth, the _________ sublayer, is roughly equivalent to the LLC sublayer in LANs.
Correct : C. l2cap
20. IEEE 802.15.4 standard is used with
Correct : A. zigbee
21. IEEE 802.15.1 standard is used with
Correct : C. wibree
22. IEEE 802.15 standard is used with
Correct : D. a and b both
23. Frequency used for communication in Z-Wave standard is
Correct : C. 860 mhz
24. Data range is maximum for (in terms of distance in meters)
Correct : D. z-wave
25. Data range is minimum for (in terms of distance in meters)
Correct : C. wibree
26. Network size is maximum for (in terms number of nodes)
Correct : A. zigbee
27. Network size is minimum for (in terms number of nodes)
Correct : B. wibree
28. Localizing and tracking of objects is an essential capability for a sensor network in many practical applications
Correct : B. applicable for stationary as well as moving objects
29. Tracking multiple interacting targets distributed over a geographical region is significantly more challenging for following reasons
Correct : D. all of above
30. Which of the following is not the requirement of routing function?
Correct : C. delay time
31. The ……… protocol allows the administrator to assign a cost, called the metric, to each route.
Correct : A. ospf
32. If there is only one routing sequence for each source destination pair, the scheme is known as …..
Correct : B. fixed alternative routing
33. An/A ……….routing scheme is designed to enable switches to react to changing traffic patterns on the network.
Correct : C. standard routing
34. The Routing Information Protocol (RIP) is an intra domain routing based on ……..routing.
Correct : A. distance vector
35. The term …….. Refers to which node or nodes in the network are responsible for the routing decision.
Correct : A. decision place
36. In ……. routing the least cost route between any two nodes is the minimum distance.
Correct : B. distance vector
37. For centralized routing the decision is made by some designated node called ……
Correct : D. network control center
38. For purposes of routing, the Internet is divided into …….
Correct : D. autonomous system
39. In ………. a route is selected for each destination pair of nodes in the network.
Correct : C. fixed routing
40. To create a neighbourhood relationship, a router running BGP sends an ………. message.
Correct : B. update
41. The technique which requires no network information required is ….
Correct : A. flooding
42. Which of the following produces high traffic network?
Correct : B. flooding
43. When a direct delivery is made, both the deliverer and receiver have the same ….
Correct : D. net id
44. In OSPF, a ……… link is a network with several routers attached to it.
Correct : B. transient
45. In ……. routing, the mask and the destination address are both 0.0.0.0 in routing table.
Correct : D. default
46. In ………. the router forwards the receive packet through only one of its interfaces.
Correct : B. multicasting
47. Battery-driven systems are those systems which are designed taking into consideration mainly _______ ( )
Correct : A. battery and its internal characteristics
48. this is an essential capability for a sensor network in many practical applications
Correct : C. localizing and tracking moving objects
49. The position estimation may be accomplished by
Correct : C. triangulation and least square computation both
50. To uniquely determine the location on a two-dimensional plane, one needs alleast ___________independent distance measurements
Correct : C. three
51. To ensure the ___________of the system, the communication and computation should be localized to relevant sensors only
Correct : C. both
52. For communication, the main consideration is that communication paths consists of many short hops can be___________ energy efficient than paths using a few long hops
Correct : A. more
53. select the correct statement
Correct : A. aim of the routing protocols is to deliver packets to nodes specified by their geographic location
54. select the correct statement
Correct : C. it may be more economical to use a smaller transmission radius for nodes in areas of high node density
55. 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___________
Correct : D. topology control
56. In___________ routing, among the neighbors y of x closer to d than x, pick the one closest to d
Correct : A. greedy distance
57. ___________routing states that "start in the face of G just beyond s along sd and walk around that face. Stop if d is reached or if the segment sd is about to be crossed. In the latter case, cross over into the next face of G along sd and repeat the process"
Correct : C. convex perimeter
58. ___________is a method that allow the nodes in a network to determine their geographic positions on their own as much as possible, during the network initialization process
Correct : B. self localization
59. The error in localization, measured as mean squared error , generally ___________as more sensor measurements are incorporated
Correct : A. decreases
60. How the leader node maintains and migrates the collaborative processing group. Arrange the following steps in correct order a: sensors are selected to acquire new measurements using the sensor selection algorithm b: after the leader is elected, it initializes a belief state as uniform disk centered at its own location c: as the target moves, the sensors that did not previously detect may begin detecting
Correct : C. b c a
61. In _______ forwarding, the routing table holds the address of just the next hop instead of complete route information.
Correct : A. next-hop
62. The idea of address aggregation was designed to alleviate the increase in routing table entries when using ________
Correct : B. classless addressing
63. A _______ routing table contains information entered manually.
Correct : A. static
64. The input and output ports of a router perform the ________ layer functions of the router.
Correct : A. physical and data link
65. In ________, each node maintains a vector (table) of minimum distances to every node.
Correct : B. distance vector
66. The metric used by _______ is the hop count
Correct : B. rip
67. The Open Shortest Path First (OSPF) protocol is an intra-domain routing protocol based on _______ routing
Correct : B. link state
68. In ______, the router forwards the received packet through only one of its interfaces.
Correct : A. unicasting
69. In _______, the router may forward the received packet through several of its interfaces
Correct : B. multicasting
70. In unicast routing, each router in the domain has a table that defines a ______ path tree to possible destinations
Correct : C. shortest
71. In multicast routing, each involved router needs to construct a ________ path tree for each group.
Correct : C. shortest
72. _________ broadcasts packets, but creates loops in the systems.
Correct : B. flooding
73. In RPF, a router forwards only the copy that has traveled the _______ path from the source to the router.
Correct : A. shortest
74. RPF eliminates the ________ in the flooding process
Correct : D. none of the above
75. Lokalization is nothiong but
Correct : C. a or b
76. _______________ is essential for any WSN application.
Correct : C. time synchronization & localization
77. For outdoor wireless sensor networks ________ is used for localization
Correct : D. a and b both
78. Choose the correct statement
Correct : B. physical coordinates remains constant and symbolic coordinates changes over time
79. Tracking problem can be described as the solution of a
Correct : A. set of localization problems at successive time intervals.
80. Localization accuracy is the _____________ distance between the estimated and the real position of the sensor node.
Correct : C. largest
81. A typical GPS receivers achieve 15 meters accuracy with 95% precision. This means that in 95% of all measurements you stay in the radius of 15 meters, whereas in the remaining 5% you have _____ errors.
Correct : B. larger
82. Localization methods have _______________ costs associated with it
Correct : C. space cost, communication cost and infrastructure cost only
83. Few node consist of GPS installed on it to simplify the localization are called as _________.
Correct : A. anchor nodes
84. Anchor nodes are the nodes having ________.
Correct : B. gps on it
85. If the target cooperates itself in localization & tracking, then it is called as _________ target tracking.
Correct : D. all of these
86. Range Based target tracking algorithm relies on
Correct : D. a and b both
87. Range free target tracking algorithm relies on
Correct : C. connectivity of nodes
88. Pre-deployment Schemes provide sensor nodes with their location information _________ them in the environment.
Correct : A. before installing
89. Pre-deployment Schemes provide sensor nodes with their location information of consist of _________
Correct : C. a and b both
90. _____________ has strategy of Non-anchor nodes try to locate themselves by sensing the positions of anchor nodes in their proximity
Correct : D. b and c both
91. _____________ has strategy of Non-anchor nodes try to locate themselves by sensing the positions of anchor nodes in their proximity
Correct : A. post-deployment localization
92. In location mules, there are no ____________ in the environment. Instead, a _________ with an on-board GPS receiver is used.
Correct : B. installed anchors, mobile node
93. The ________ the transmission power of the mule, then ________ is the accuracy of positioning.
Correct : C. weaker, better
94. In triangulation, need to measure the angle between the sensor node and the anchors and use this information to compute nodes own position.
Correct : A. angle
95. For trilateration, we measure distances to at least _______ anchors.
Correct : B. 3
96. For trilateration, we measure _______ between the node and anchors.
Correct : B. distance
97. Trilateration measures distance based on radio communication by mapping _____ values into distances.
Correct : A. received signal strength indicator - rssi
98. The time difference of arrival method uses ___________ communication interfaces to estimate distance.
Correct : C. radio and acoustic
99. In case of iterative localization the accuracy of localization ________ with each iteration.
Correct : B. decreases
100. Node gather enough anchor points and measurements, they compute their own locations. Once they have localized, they also declare themselves as an anchors. In this way, sensor nodes without enough anchors get a chance to localize. This approach is called as ____________ localization.