单项选择题
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
单项选择题 What are the usable hosts on the 200.50.12.64/26 network?（）
单项选择题 What are the usable hosts on the 192.168.1.24/29 network?（）
单项选择题 You have been asked to use a 28 bit subnet mask to segment the following network block: 108.12.5.0. How many usable hosts per sub-net could you create?（）
