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    Question

    A company needs to create 10 subnets from the network

    192.168.1.0/24. What is the minimum subnet mask required to accommodate this, and how many usable hosts per subnet will there be?
    A /27, 30 hosts Correct Answer Incorrect Answer
    B /28, 14 hosts Correct Answer Incorrect Answer
    C /29, 6 hosts Correct Answer Incorrect Answer
    D /26, 62 hosts Correct Answer Incorrect Answer
    E /25, 126 hosts Correct Answer Incorrect Answer

    Solution

    To get 10 subnets, we need 2^n >= 10, so n=4 bits for subnetting. Original /24 becomes /24+4 = /28. For /28, the number of host bits is 32-28 = 4. Number of usable hosts = 2^4 - 2 = 16 - 2 = 14.

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