Which two subnetworks would be included in the summarized address of 172.31.80.0 /20？ （）
- A、172.31.17.4/30
- B、172.31.51.16/30
- C、172.31.64.0/18
- D、172.31.80.0/22
- E、172.31.92.0/22
- F、172.31.192.0/18
正确答案:D,E
答案解析:有
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Which two subnetworks would be included in the summarized address of 172.31.80.0 /20？ （）
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