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3. Physical Layer Introduction - Data Communication & Networks

📖 From Data Communication & Networks • 181 questions available

Practice MCQs for 3. Physical Layer Introduction. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

🔄 Last updated: 2026-06-28

57
Easy Questions
86
Medium Questions
38
Hard Questions

📝 Topics in this Chapter

📝 Sample Questions

Q1. What is the fundamental difference between analog and digital data?

🔹 A. Analog data is discrete, while digital data is continuous.
🔹 B. Analog data is continuous, while digital data has discrete states.
🔹 C. Analog data uses binary, while digital data uses decimal.
🔹 D. Analog data is faster to transmit than digital data.

💡 Difficulty: easy | ✅ Correct: B

Q2. In data communications, which combination of signal types is most commonly used?

🔹 A. Periodic digital and nonperiodic analog.
🔹 B. Periodic analog and nonperiodic digital.
🔹 C. Periodic analog and periodic digital.
🔹 D. Nonperiodic analog and nonperiodic digital.

💡 Difficulty: medium | ✅ Correct: B

Q3. What is the primary advantage of digital signals over analog signals?

🔹 A. Digital signals are less susceptible to noise and distortion.
🔹 B. Digital signals require less bandwidth.
🔹 C. Digital signals are easier to amplify.
🔹 D. Digital signals can travel longer distances.

💡 Difficulty: hard | ✅ Correct: A

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