May 2024
Intermediate to advanced
309 pages
13h 33m
English
Content preview from Data Communications and Computer Networks by Pearson
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3
Analog and Digital
Transmission
1. What do you mean by data and signal?
Ans: Data refers to an entity that expresses some meaning based on rules which are agreed upon by
the sender and the receiver. It can be available in various forms such as text, graphics, audio and video.
Signal refers to the representation of the data in a form (such as electrical, electronic or optical) suitable
for transmission over a transmission medium.
2. Defin analoganddigitaldata.
Ans: Analog data is defined as the data having continuous states. For example, sounds produced
while speaking take continuous values. Digital data is defined as the data
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