1. Why does the delay approach to infinity while A is near to Z Causes/costs of congestion: scenario I original data: throughput ??ut two senders, two receivers one router, infinite buffers output link capacity: R no retransmission unlimited shared output link buffers R/2 in R/2 ??n R/2 maximum per-connectionlarge delays as arrival rate, throughput: R/2 ??n, approaches capacity 1. Why does the delay approach to infinity while A is near to Z Causes/costs of congestion: scenario I original data: throughput ??ut two senders, two receivers one router, infinite buffers output link capacity: R no retransmission unlimited shared output link buffers R/2 in R/2 ??n R/2 maximum per-connectionlarge delays as arrival rate, throughput: R/2 ??n, approaches capacity