Question 1
A host sends a file of size 10 MB (10 * 10^6 bytes) over a link of bandwidth 100 Mbps. The distance between source and destination is 2000 km, and propagation speed in the medium is 2 * 10^8 m/s. What is the total latency (transmission delay + propagation delay) in milliseconds?
Transmission delay Tx = (10 * 10^6 * 8) / (100 * 10^6) = 0.8 $s = 800 ms$. Propagation delay Tp = (2000 * 10^3) / (2 * 10^8) = 0.01 $s = 10 ms$. Total latency = 800 + 10 = 810 ms.