Refer to the exhibit. What is the most appropriate summarization for these routes?（） 
- A、10.0.0.0/21
- B、10.0.0.0/22
- C、10.0.0.0/23
- D、10.0.0.0/24
正确答案:B
答案解析:有
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Refer to the exhibit. What is the most appropriate summarization for these routes?（）
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