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📝 Services in Data Link Layer

📖 From Data Communication & Networks • 9. Introduction to Data Link Layer • 32 questions available

Practice MCQs for Services in 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 a frame is corrupted during transmission between Alice and router R2, which data‑link service will most likely prevent the error from propagating to the network layer?

🔹 A. Error detection using CRC

🔹 B. Flow control

🔹 C. Address resolution

🔹 D. Broadcast

💡 Difficulty: easy | ✅ Correct: A

Q2. When Alice sends a frame to Bob via routers R2 and R4, the frame must be re‑encapsulated at each hop. If the frame size exceeds the MTU of the link between R2 and R4, what logical consequence follows?

🔹 A. The frame will be fragmented at the network layer

🔹 B. The frame will be dropped and an ICMP message sent

🔹 C. The frame will be padded to fit the MTU

🔹 D. The frame will be transmitted unchanged

💡 Difficulty: medium | ✅ Correct: B

Q3. Suppose the link between R2 and R4 uses a stop‑and‑wait protocol with a 10 ms round‑trip time and a frame transmission time of 2 ms. What is the maximum throughput achievable on this link?

🔹 A. \( \frac{1}{12\text{ ms}} \) frames per ms

🔹 B. \( \frac{2\text{ ms}}{12\text{ ms}} \) of link capacity

🔹 C. \( \frac{2\text{ ms}}{10\text{ ms}} \) of link capacity

🔹 D. \( \frac{2\text{ ms}}{12\text{ ms}} \) of link capacity

💡 Difficulty: hard | ✅ Correct: D

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🔗 Related Topics

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

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