Correct : C. the internal clock of the nodes are not synchronized.
2. Timeout-MAC (T-MAC) letting the nodes timeout when nothing happens
Correct : B. during their active periods.
3. Berkeley MAC (B-MAC) was developed to tackle the problems of
Correct : B. s-mac
4. Long preamble used in Berkeley MAC (B-MAC) has long preamble consist of
Correct : D. has variable length and may carry sender, receiver, and packet size information
5. Long preamble used in Berkeley MAC (B-MAC) has to be send at least for duration of
Correct : C. sleeping time
6. The MAC protocol,
Correct : B. does not guarantee that the transmission will be successful
7. incorrect statement is
Correct : B. link quality indicator (lqi) positive number ranging from approximately 110 to 50
8. The packet reception ratio (PPR) is depicted against the distance
Correct : C. at long distance between nodes, the prr decreases
9. In the clear communication zone communication is
Correct : B. almost impossible, but interference might still occur.
10. The purpose of error control is to
Correct : D. a and b both
11. Backward Error Control –
Correct : A. should not try to prevent errors but only discover errors.
12. Forward Error Control-
Correct : D. attempts to prevent errors instead of only detecting them
13. Select correct statement for naming
Correct : C. name does not reveal anything about the position of the node. reveal something about the role.
14. Select correct statement for addressing of node
Correct : B. address reveal about the position of the node, but not about the role.
15. Centralized Topology Control
Correct : B. requires significant communication overhead
16. Distributed Topology Control
Correct : C. more flexible, situation-aware
17. What is shadowing?
Correct : B. undirect signal
18. In wireless distribution system
Correct : C. multiple aps are inter-connected with each other
19. What device is the wireless equivalent of a wired hub?
Correct : D. access-point
20. The type of access used in GSM technology is
Correct : A. tdma
21. Uplinks are also knowns as
Correct : A. reverse link
22. The RTS and CTS frames in CSMA/CA ____ solve the hidden station problem. The RTS and CTS frames in CSMA/CA ____ solve the exposed station problem.
Correct : A. can; cannot
23. A one-to-all communication between one source and all hosts on a network is classified as a _______ communication.
Correct : C. broadcast
24. A one-to-many communication between one source and a specific group of hosts is classified as a _______ communication.
Correct : B. multicast
25. A one-to-one communication between one source and one destination is classified as a _______ communication.
Correct : A. unicast
26. While defining a unifying architecture for sensor networks is still an open problem, a key element of such an architecture is the principled interaction between the______ &_____layers
Correct : A. application /network
27. ___________defines both the physical and MAC layer protocols for most remote monitoring and control as well as sensor network applications
Correct : B. ieee802.15.4 standard
28. ___________is an industry consortium with the goal of promoting the IEEE802.15.4 standard
Correct : B. zigbee
29. Following are features of ZigBee
Correct : D. all of above
30. What networking structure do the 802.11 standards define?
Correct : A. wlan
31. Which one of the IEEE 802 committees is tasked with the development of security standards?
Correct : A. 802.1
32. Specifications for a wireless LAN are called
Correct : D. ieee 802.11.
33. What industry association develops, publishes, and maintains the standards for wireless networks?
Correct : A. ieee
34. What term is used to represent the physical layer of an 802.11x standard?
Correct : B. phy
35. What is the term used to represent the IEEE 802.11 layer that controls access to the medium?
Correct : C. mac
36. What is the RF communications standard that can organize up to 8 devices into a piconet?
Correct : A. bluetooth
37. Which of the IEEE 802 standards defines the technologies used to form and manage personal area networks?
Correct : D. 802.15
38. Which of the following is Bluetooth's Physical layer?
Correct : B. baseband
39. The use of Ultra wideband (UWB) technology for WPANs is specified under the __________ standards.
Correct : C. 802.15.3
40. ___________is an industry consortium with the goal of promoting the IEEE802.15.4 standard
Correct : B. zigbee
41. ___________defines both the physical and MAC layer protocols for most remote monitoring and control as well as sensor network applications
Correct : C. ieee802.15.4 standard
42. Following is/are features of ZigBee
Correct : D. all of above
43. Unlike_____, ______achieves its power efficiency from both the physical and MAC layers
Correct : B. smac protocol , ieee802.15.4 standard
44. Protocol used for low data rate WPAN is
Correct : D. ieee 802.15.4 standard
45. Protocol used for high data rate WPAN is
Correct : C. ieee 802.15.3 standard
46. IEEE 802.15.4 standard has data rate of
Correct : A. 20 kb/s, 40kb/s, 250kb/s
47. IEEE 802.15.4 standard has ______ channels are in the 915MHz ISM band.
Correct : B. 10
48. IEEE 802.15.4 standard has ______ channels are in the 2.4GHz ISM band.
Correct : C. 16
49. IEEE 802.15.4 standard has ______ channels are in European 868MHz band.
Correct : A. 1
50. Which of the following is not the job of IEEE 802.15.4 PHY standard
Correct : C. channel acquisition
51. Which of the following is not the job of IEEE 802.15.4 MAC standard
Correct : B. data transparency
52. Which of the following is the job of IEEE 802.15.4 PHY standard
Correct : C. power management
53. Size of guard band is larges in case of ____________
Correct : A. 2.4ghz ism band
54. Following device class is able to be a Network coordinator
Correct : A. full function device (ffd)
55. Following device class is able to talk to any other device
Correct : A. full function device (ffd)
56. Select correct statement about Full function device (FFD)
Correct : D. can be used in star, tree and mesh topology
57. Select correct statement about Reduced function device (RFD)
Correct : B. talks to network coordinator only
58. Device class of Full function device (FFD) is used in
Correct : D. any of the above topology
59. _________ MAC frame serve to announce the presence of a wireless LAN and to synchronize the members of the service set.
Correct : B. beacon frame
60. _________ MAC frame serve as the control frame.
Correct : C. acknowledgment frame
61. _________ MAC frame is also called as Management frame.
Correct : D. mac command frame
62. In 802.15.4 standard Beacon frames are transmitted by coordinator
Correct : B. periodically
63. The date available from sensor node is of type
Correct : A. periodic data
64. Select incorrect statement about ZigBee standard.
Correct : D. limits transmission distances to 1–10 km beyond line of sight,
65. Select correct statement.
Correct : D. zigbee limits transmission distances to 10–100 meters, in line of sight,
66. Following is not the function of ZigBee used with IEEE 802.15.4 standard
Correct : C. channel acquisition
67. Number of nodes possible with ZigBee network are
Correct : D. 64000
68. Date rate of 250 kbps is maximum for ________ technology.
Correct : B. zigbee
69. Life of ZigBee devices w.r.t. power consumption is in ________
Correct : C. years
70. Range of ZigBee standard devices is
Correct : B. 50- 100 meters
71. Low data rate standard used for WPAN is
Correct : B. ieee 802.15.4
72. High data rate standard used for WPAN is
Correct : C. ieee 802.15.3
73. ZigBee 915 MHz ISM band has data rate of
Correct : B. 40kbps
74. ZigBee 868 MHz band has data rate of
Correct : C. 250bps
75. ZigBee 2.4GHz ISM band has data rate of
Correct : A. 20kbps
76. Following layer of ZigBee is shared FOR alliance with IEEE 802.15.4
Correct : D. mac layer
77. Function of MAC layer in ZigBee alliance is
Correct : B. transmits the beacon frames
78. Type of ZigBee participate in multi-hop routing of message is
Correct : D. a and b both
79. Wireless Technology having bandwidth of 1 Mbps is
Correct : C. bluetooth
80. Wireless Technology having bandwidth of 250 Kbps is
Correct : A. zigbee
81. Wireless Technology having bandwidth of up to 54 Mbps is
Correct : B. wi-fi
82. WirelessHART is stands for
Correct : C. highway addressable remote transducer protocol
83. Wireless HART is based on
Correct : B. ieee 802.15.4-2006, 2.4ghz ism band
84. ISA100.11a is a wireless networking technology standard where ISA stands for
Correct : C. international society of automation
85. ISA100.11a protocol stack includes following layers:
Correct : B. physical layer, data link layer, network layer, transport layer and application layer.
86. _________ provides IP communication capability to nodes in WSN.
Correct : C. 6lowpan
87. Standard to be used for virtual wireless multimedia connectivity is
Correct : B. ieee 802.15.3
88. Feature of IEEE 802.15.3 is
Correct : C. high data rate and low power
89. FSK modulation technique is used in ______- standard.
Correct : B. insteon
90. IEEE 802.15.4 ANT presents a data rate of
Correct : C. 1 mbit/sec
91. The objective of the cross-layer protocol in WSN is
Correct : D. all of the bove
92. A Z-Wave network can consist of ____________ nodes to the max.
Correct : B. 232
93. The Z-Wave Network is of the ______ architecture
Correct : C. mesh
94. In case of Z wave network, ______ node has complete map and calculate routes
Correct : B. controllers
95. In case of Z wave network, ______ node can act as repeater.
Correct : D. a and b both
96. Z-Wave uses a ______ bit identifier
Correct : C. 32
97. Wireless HART communication protocol able to work on distances up to ____________
Correct : B. 1500 m
98. Wibree Nokia’s short-range wireless connection which is similar and compatible to Bluetooth is
Correct : C. more energy efficient than bluetooth
99. At the physical layer, contribute to energy loss in a wireless transmission, the loss is
Correct : C. both
100. As the energy used in transmission ___________, the probability of error ___________, and the number of retransmissions _________.