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單項選擇題

You must segment your internal /24 network into a minimum of 12 subnets, each containing a minimum of 12 hosts. Which network mask do you use?（）

A. /26
B. /27
C. /28
D. /29

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單項選擇題

You have been assigned the /24 network and need to segment it into at least 60 subnets. Which network mask meets this requirement?（）

A. /27
B. /28
C. /29
D. /30

單項選擇題

Which network mask is the equivalent of 255.255.248.0?（）

A. /20
B. /21
C. /22
D. /23