Refer to the exhibit. Voice traffic is marked "precedence 5." How much bandwidth is allocated for voice traffic during periods of congestion？（）
- A、a minimum of 48 kb/s
- B、a maximum of 48 kb/s
- C、a minimum of 48% of the available bandwidth
- D、a maximum of 48% of the available bandwidth
正确答案:B
答案解析:有
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