Best Videos or Tutorials For Subnetting

tmcgtmcg Banned Posts: 127
This is one area I am not vere strong in, however I would like to master it as eventually I will take the CCNA. Any suggestions would be appreciated :)


  • kohr-ahkohr-ah Member Posts: 1,277
    Let me see if I can dig up one of the sites I used to use.

    I always remember it like this.

    Subnet mask subtracted from 256 gets me my ranges.
    Example: 192.168.1.x
    Subtract 240 from 256 and you get 16
    So - 15 - 31
    And so on. Then just subtract 2 for hosts range.

    Wild cards? Do the same thing but subtract from 255 means 15 so would be the wild card
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