Your boss has asked you to tell him how many usable subnets and hosts a Class C network with the IP address and mask of 192.168.10.0/28 can have. How should you respond?
A) 16 subnets and 16 hosts
B) 16 subnets and 14 hosts
C) 30 subnets and 6 hosts
D) 62 subnets and 2 hosts
B
Explanation: B) The correct answer is 16 subnets and 14 hosts because after converting the /28 to DDN, you find the value of 16 and, using the formula 2n = S (for subnets), get the number 16. For hosts, the equation is the same, but you must subtract 2 (2n — 2 = H).
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