Your company is designing its network. The network will use an IPv6 prefix of 2001:DB8:BBCC:0000::/53. You need to identify an IPv6 addressing scheme that will support 2000 subnets. Which network mask should you use？（）
- A、/61
- B、/62
- C、/63
- D、/64
正确答案:D
答案解析:有
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