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Thread: Subnet question

  1. Junior Member
    Join Date
    Sep 2017

    Default Subnet question

    Hello all

    Stuck on this problem. plz help

    What is the network address and subnet mask (in CIDR noration) of the hidden (xxx.xxx.xxx.xxx/xx) subnet? The whole network has a network address and subnet mask of

    The correct answer is:
    The block size for a subnet is 256-subnet mask value. Start at zero and count in block sizes. Every block size will be a new network address. Find the block size of the highest subnet and see what the next block will be.

    I am able to understand /26 part but how are they getting the network ID?

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  2. SS
  3. Junior Member Registered Member
    Join Date
    Feb 2014
    Is this a multiple choice? What is the other option? Just to know.
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  4. Senior Member NEODREAM's Avatar
    Join Date
    Apr 2016
    /26 is so your block size is 64, which indicates when each network begins, example: - .63 - .127 - .191 - .255

    From the way the question is asked I'm still not too sure what they are wanting, but to answer your question that is why the network starts at the .128 for a /26 in this example.
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