Hi Keith,

What I find helpful is to do this for inverse masks:

Just subtract the number from 255.  So for your 7, it will be 255-7 which
is 248.

Hope that helps
Helena

On Tue, 24 Oct 2000, Keith Townsend wrote:

> I need help in understanding inverse masks that are used in network & access
> list commands.  I understabd what 0 and 255 do but I get confused when there
> is any number other than these two.  For example...
> 
> network 10.0.0.0 0.7.255.255 area 0
> 
> what does the 7 represent or specifiy for the mask.
> 
> Thanks
> 
> Keith
> 
> 
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