Below are the answers key for the Multiple Choice Questions in Digital and Data Communication Networks – MCQs Part 2.
51. The components are simpler, less costly, and more reliable
52. Agreed upon in advance between sender receiver
53. Refer to the modem and the computer or terminal, respectively
54. Determined by the sender and receiver, not by the communications system
55. Print one character at a time
56. Involves the interface between people and machines, such as terminals
57. Differ in whether the bits are on separate wires or on one
58. Is less efficient than synchronous, but simpler
59. Entropy
60. How likely symbols are to be repeated
61. Inductance
62. More bandwidth than analog
63. Standard for interfaces between terminal and modems
64. The clocking is derived from the data in synchronous transmission
65. They must contain clock recovery circuits
66. Transmitter section
67. Gray code
68. Equalizer
69. Bipolar
70. An adaptive equalizer
71. Set of symbols
72. 5
73. 1
74. ASCII
75. DDCMP does not require special hardware to find the beginning of a message
76. Computer bus
77. Voiceband modem
78. Application independent interfaces
79. Optical fibers
80. Automatic retransmission of a message
81. No signal change at a 1 to 0 transition
82. Data link control
83. Broadcast
84. In-service expansion
85. Unlimited number of stations
86. Digital PBX
87. Digital PBX
88. Fiber optics transmission
89. High-speed file transfers
90. Lower cost telephones
91. The physical layer protocol
92. DTE/DCE interface
93. A recommendation of the CCITT
94. Between peers
95. Local loop standards for a telephone network
96. Not including the user or communications medium
97. Three
98. User data
99. 3
100. Three octets of header plus data
Online Questions and Answers Series
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