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📝 Introduction to Data Communications

📖 From Data Communication & Networks • 1. Introduction • 28 questions available

Practice MCQs for Introduction to Data Communications. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

🔄 Last updated: 2026-06-28

11
Easy Questions
12
Medium Questions
5
Hard Questions

📝 Sample Questions

Q1. A company's security system sends a signal to a monitoring station only when a door is opened. This is an example of which data flow?

🔹 A. Simplex
🔹 B. Half-Duplex
🔹 C. Full-Duplex
🔹 D. Multiplex

💡 Difficulty: easy | ✅ Correct: A

Q2. What is the primary purpose of a "protocol" in a data communications system?

🔹 A. To physically connect two devices.
🔹 B. To define a set of rules for communication.
🔹 C. To convert analog signals to digital signals.
🔹 D. To increase the speed of data transmission.

💡 Difficulty: medium | ✅ Correct: B

Q3. In the context of data communications, what does "jitter" refer to?

🔹 A. The total time for a signal to travel from source to destination.
🔹 B. The variation in packet arrival time causing uneven delivery.
🔹 C. The number of packets lost during transmission.
🔹 D. The overall capacity of a network connection.

💡 Difficulty: hard | ✅ Correct: B

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🔗 Related Topics

📝 Network Concepts (Criteria & Topologies)📝 Network Types (LAN, WAN, Switching)📝 Standards and Administration📝 The Internet and its History📝 Protocol Layering
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