Using the rules for IPv6 addressing, how can t he address 2031:0000:240F:0000:0000:09C0:123A:121B be rewritten?（）
- A、2031:0:240F::09C0:123A:121B
- B、2031::240F::09C0:123A:121B
- C、2031::240F:9C0::123A:121B
- D、2031::240F:::09C0:123A:121B
正确答案:A
答案解析:有
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