You need to subnet a class C network that has 5 subnets, each with at least 16 hosts. Which classful subnet mask would you use?
A) 255.255.255.192
B) 255.255.255.224
C) 255.255.255.240
D) 255.255.255.248
B
Explanation: B) The 255.255.255.224, or /27 mask, provides 3 subnet bits (23 = 8 ) and 5 host bits (25 - 2 = 30).
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