Your network uses the172.12.0.0 class B address. You need to support 459 hosts per subnet, while accommodating the maximum number of subnets. Which mask wouldyou use?（）
- A、255.255.0.0.
- B、255.255.128.0.
- C、255.255.224.0.
- D、255.255.254.0.
正确答案:D
答案解析:有
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