Suppose there is only one packet switch between a sending host and a receiving host.
The transmission rate between the sending host A and the switch is R1.
The transmission rate between the switch and the receiving host B is R2.
The distance between host A and the switch is d1. The distance between the switch and host B is d2. Assuming that the propagation speed is s and the switch uses store-and-forward packet switching.
what is the total end-to-end delay to send a packet of length L from A to B?