What is the total delay (latency) for a frame size of 10 million bits that is being set up on a link with 20 routers, each having a queuing time of 2 μ μs s and a processing time of 1 ? The length of link 5000 km. The speed of light inside the link is 2 * 108 m /s. The link has bandwidth of 6 Mbps.

1. A0.624050 s
2. B1.691726 s
3. C2.425080 s
4. D1.714030 s

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Correct answer: B. 1.691726 s

Explanation

Transmission: 10⁷ ÷ (6 × 10⁶) = 1.666667 s. Propagation: 5 × 10⁶ m ÷ 2 × 10⁸ m/s = 0.025 s. Routers: 20 × (2 + 1) μs = 60 μs. Total ≈ 1.691727 s.