Which of the characteristics below is associated with the （QoS） Integrated Services Model？ （）
- A、 QoS classified at layer 3 using IP precedence or DSCP.
- B、 Guaranteed rate service.
- C、 Implemented using FIFO queues.
- D、 All traffic has an equal chance of being dropped.
正确答案:B
答案解析:有
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