A sender sends a 1000-byte packet over a 1000 km cable with a propagation speed of 2/3 * 10^8 m/s. What is the propagation delay?
Q1. A sender sends a 1000-byte packet over a 1000 km cable with a propagation speed of 2/3 * 10^8 m/s. What is the propagation delay?
Answer: 7.5 ms
Explanation: Propagation delay = distance / propagation speed = (1000 * 1000) / ((2/3) * 10^8) = 1000 / ((2/3) * 10^5) = 15 / 2 = 7.5 ms.