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1. You need to subnet a network that has 5 subnets, each with at least 16 hosts. Which classful subnet mask would you use?
Solution:
You need 5 subnets, each with at least 16 hosts. The mask 255.255.255.240 provides 16 subnets with 14 hosts-this will not work. The mask 255.255.255.224 provides 8 subnets, each with 30 hosts. This is the best answer.