exam 70-291 subnetting help

Discussion in 'MCSE' started by sunnie38, May 4, 2007.

  1. sunnie38


    May 4, 2007
    Likes Received:
    I'm studying for the 70-291 exam and I am having a little trouble understanding the idea of borrowing bits. I understand the subnet classes but am having trouble with a question like:

    "You have a network address of with a subnet mask of /27. How many usable hosts can you create with this networking scheme?"

    I do not understand what the /27 represents or how to calculate how many hosts can be created.

    I feel very confident with the rest of the material, but I am just having a hard grasping this concept or finding a web site that explains it starting with the basics.

    Can anyone help explain this or know of a good web site where I can research this?

    Thank you!
    sunnie38, May 4, 2007
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