Wildcard mask question...
CompUBug
Member Posts: 46 ■■□□□□□□□□
in CCNA & CCENT
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
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
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blackberry
Member Posts: 59 ■■□□□□□□□□
its always one less the block size so it should be 0.0.15.255
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CompUBug
Member Posts: 46 ■■□□□□□□□□
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? -
networker050184
Mod Posts: 11,962 Mod
0 - 255 = 256An expert is a man who has made all the mistakes which can be made.