Wildcard mask question...

CompUBugCompUBug Posts: 46Member ■■□□□□□□□□
In the /24 subnet mask...255.255.255.0 0.0.0.255 would mean to block 255 hosts on an access list...or the entire subnet on this IP scheme...

Now lets say we back it up to a class B subnet... 255.255.0.0 and we wanted to only block the first 16 hosts...Would that be... 0.0.0.16 ??

1 6 3 1 8 4 2 1
2 4 2 6
8
0 0 0 1 0 0 0 0

Comments

  • blackberryblackberry Posts: 59Member ■■□□□□□□□□
    its always one less the block size so it should be 0.0.15.255
  • CompUBugCompUBug Posts: 46Member ■■□□□□□□□□
    blackberry wrote: »
    its always one less the block size so it should be 0.0.15.255

    Oh okay, so thats why its 255 and not 256?
  • networker050184networker050184 Posts: 11,962Mod Mod
    0 - 255 = 256
    An expert is a man who has made all the mistakes which can be made.
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