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📝 An Example of Communication in Link Layer Addressing and the Data Link Layer

📖 From Data Communication & Networks • 9. Introduction to Data Link Layer • 18 questions available

Practice MCQs for An Example of Communication in Link Layer Addressing and the Data Link Layer. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

🔄 Last updated: 2026-07-31

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📝 Sample Questions

Q1. If Alice’s data‑link layer cannot establish a logical connection with router R2, which outcome is most likely?

🔹 A. Alice will still send frames that reach R2

🔹 B. Frames will be discarded locally and an error will be reported

🔹 C. The packet will be routed at the network layer bypassing the data‑link layer

🔹 D. Communication will continue using a backup wireless link

💡 Difficulty: easy | ✅ Correct: B

Q2. Suppose a frame arriving at R2’s data‑link layer fails its CRC check. What is the most probable effect on the end‑to‑end communication?

🔹 A. R2 will correct the error using forward error correction

🔹 B. R2 will discard the corrupted frame and request retransmission from Alice

🔹 C. R2 will forward the frame unchanged, relying on higher layers to detect the error

🔹 D. R2 will terminate the TCP session immediately

💡 Difficulty: medium | ✅ Correct: D

Q3. Consider that the path from Alice to the destination traverses four data‑link segments. If each segment introduces a latency of \(2.5\) ms, what is the total minimum latency contributed solely by the data‑link layer?

🔹 A. \(5\) ms

🔹 B. \(7.5\) ms

🔹 C. \(10\) ms

🔹 D. \(12.5\) ms

💡 Difficulty: hard | ✅ Correct: C

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🔗 Related Topics

📝 Data Link Layer basics 📝 Nodes and Links in Data Link Layer 📝 Services in Data Link Layer 📝 Two Categories of Links in Data Link Layer 📝 Two Sublayers in Data Link Layer

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