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Data Transmission Network - Multiple Choice Questions and Answers | Page-4

Questions
16 For carrying digital data over long distance using digital signal, at appropriately spaced points, we must have
A Amplifiers
B Repeater
C Either amplifiers or repeater
D None of the above

Answer: Option [C]
17 An example of digital, rather than analog communication is
A DDD
B WATS
C DDT
D DDS

Answer: Option [D]
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18 What are the most commonly used transmission speeds in BP used in data communication ?
A 300
B 1200
C 2400
D 9600

Answer: Option [D]
19 In satellite communication, up-link frequency and downlink frequencies are different because:
A By this method interference can be avoided
B By this method full duplex operation can be carried out.
C This is the usual convention in satellite communication.
D None of the above

Answer: Option [A]
20 Frequency range of human voice and audible to human ears is usually in the range of
A 200 KHz to 600 KHz
B 400 Hz to 3.4 KHz
C 100 MHz to 400 MHz
D None of the above

Answer: Option [B]

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