Câu 31: H35-211-V2-5: HCIP-Access V2.5

Congestion avoidance and congestion management ensure that high-priority services are preferentially forwarded to reduce delay and packet loss. Which of the following statements are false? (Choose all that apply.)

1. A. When congestion occurs in the upstream direction, increasing the PIR in the traffic profile helps avoid queue congestion and reduce packet loss. — đáp án hiện tại
2. B. When congestion occurs in the upstream direction, the default congestion avoidance mechanism may cause packet loss of voice services.
3. C. When congestion occurs in the upstream direction, weighted random early detection (WRED) early drop based on packet colors helps reduce packet loss in queues.
4. D. When congestion occurs in the upstream direction, the packets in the queue whose weight is 0 can surely be transmitted with a low delay. — đáp án hiện tại