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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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