This is for my Technologies Infrastructure and Architecture class.

Why do you think the store-and-forward packet switching method might be more common in routers than continuous transmission? Suppose there is exactly one packet switch between a sender and receiver. The transmission rates between the sender and the switch and between the switch and receiver are R_1 and R_2 respectively. Assuming the switch uses store-and-forward packet switching, what is the total end-to-end delay to send a packet of length L (ignoring queueing, propagation, and processing delays)