128 => 10000000
135 => 10000111
The 1st 5 bits stay the same and so are part of your netmask
11111000 => 248
Also netmask's are always a string of 1's followed by a string of 0's.
Don't try mixing them up!
> I have a block of 8 ip address.
> from a class C. for example.
>
> x.x.x.128 to 135
>
> I make my network address x.x.x.128
> my broadcast address x.x.x.135
> but what do i set for my netmask? 255.255.255.???
>
> how do i figure out the netmask for
> something like this?
>
> Thanks
>
>
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