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Which of the following best describes an analog signal?

easy📝 Conceptual Q11 of 15
Computer Networks - Physical and Data Link Layer
Which of the following best describes an analog signal?
AA smooth and continuous signal that varies over time
BA signal that uses only two discrete values, 0 and 1
CA signal that is always digital and error-free
DA signal that cannot carry sound or light information
Step-by-Step Solution
Solution:

  1. Step 1: Understand the nature of analog signals

    Analog signals are continuous and can take any value in a range, representing natural phenomena like sound or light.

  2. Step 2: Compare with digital signals

    Digital signals use discrete steps (0 and 1), unlike analog signals which are smooth and continuous.

  3. Final Answer:

    A smooth and continuous signal that varies over time -> Option A

  4. Quick Check:

    Analog = continuous signal [OK]
Quick Trick: Analog = smooth continuous wave, digital = steps [OK]
Common Mistakes:
MISTAKES
  • Confusing analog with digital signals
  • Thinking analog signals use only 0 and 1
  • Assuming analog signals are error-free

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