Free Cisco 300-420 Actual Exam Questions - Question 6 Discussion
with a 100Mbps CIR. The ISP aggressively drops all traffic received over which is causing numerous
TCP retransmissions. The customer is not using any RTP applications but wants to maximize
bandwidth usage up to the CIR. Which QoS solution engineer choose?
D imo, queuing can help manage bursts better than policing which just drops.
Makes sense to smooth traffic before it hits ISP limits, so B.
Probably B here. Traffic shaping makes the customer’s traffic smoother so it doesn’t exceed the CIR in bursts, avoiding those harsh drops by the ISP. Policing (A) just drops excess traffic right away, which causes retransmissions—exactly what the question says is happening now. Queuing (D) helps prioritize but doesn’t solve the problem of traffic exceeding the CIR and getting dropped. Policer with markdown (C) is a bit too complex and might still drop packets aggressively. So shaping fits best to keep traffic within limits and reduce packet loss.
B imo, shaping limits bursts so ISP doesn’t drop packets aggressively.
Maybe C, since a policer with markdown can reduce burst impact without full drops.
D makes sense to buffer bursts instead of dropping packets immediately.
B imo, shaping helps avoid drops unlike policing which is too harsh here.