Question

Calculate the total time required to transfer a 2 MB file assuming an RTT of 100 ms, an initial 2 x RTT of “handshaking” before data is sent, and a bandwidth of 5 Mbps (assume data can be sent continuously).

Answer 1

Initial handshake = 2 x RTT => 2 x 100 ms => 2 x 0.1 sec => 0.2 second

Propagation delay = half of RTT => 0.1/2 = 0.05 seconds

Transmission time = 2 x 8 x 2²⁰ / 5 x 2²⁰ => 16/5 => 3.2 seconds


The total time required = 3.2 + 0.05 + 0.2 => 3.45 seconds

Thanks, PLEASE COMMENT if there is any concern.