单选题You have been asked to use a 25 bit subnet mask to segment the following network block: 209.18.12.0. How many usable will there be per subnet?（）A2 hostsB120 hostsC126 hostsD255 hosts
单选题
You have been asked to use a 25 bit subnet mask to segment the following network block: 209.18.12.0. How many usable will there be per subnet?（）
A
2 hosts
B
120 hosts
C
126 hosts
D
255 hosts
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