请问?

gameking123

Which three IP addresses can be assigned to hosts if the subnet mask is /27 and subnet zero is usable?
(Choose three.)
A. 10.15.32.17
B. 17.15.66.128
C. 66.55.128.1
D. 135.1.64.34
E. 129.33.192.192
F. 192.168.5.63
Answer: ACD
这题为什么是ACD？请教各位！我的英语水平有限~可以理解题不对。。谢谢

老鬼

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