Câu 36: H35-211-V2-5: HCIP-Access V2.5

Which of the following statements about QoS is incorrect?

1. A. Traffic classification is performed by identifying characteristic parameters of packets, such as the VLAN ID and priority. Traffic classification is the basis of subsequent QoS operations.
2. B. When the rate in one direction is too high, an OLT can process the packets through traffic policing, mark the packets with colors, or discard the packets.
3. C. It is recommended that an OLT re-marks the priorities of upstream packets from the client side. — đáp án hiện tại
4. D. To prevent a large number of subsequent packets from being discarded to queue congestion on the outbound interface, proper congestion management methods should be taken.