You have a class B network with a 255.255.255.0 mask. Which of the statements below are true of this network?（）
- A、There are 254 usable subnets.
- B、There are 256 usable hosts per subnet.
- C、There are 50 usable subnets.
- D、There are 254 usable hosts per subnet.
- E、There are 24 usable hosts per subnet.
- F、There is one usable network.
正确答案:A,D
答案解析:有
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