Which two statements about the best effort model for QoS are true?()
- A、delay sensitive packets are given preferential treatment
- B、the default policy identifies a delay sensitive class and default class
- C、the default policy identifies a delay sensitive class, best effort class, and default class
- D、the model is highly scalable
- E、the model is still predominant on the internet F the model provides guaranteed service
正确答案:D,E
答案解析:有
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