These numbers are the decimal version of their binary equivalents.
The binary bit positions have the following values, from left to right:
128,64,32,16,8,4,2, and 1. You can determine the decimal equivalent of a
binary number by adding up the values for the bit positions.
255 (decimal) = 1111 1111 (binary)
224 = 1110 0000
192 = 1100 0000
I hope this makes sense. It's very late and I've been working on a resume.
You know how annoying THAT can be! :-)
John Neiberger
> Group --
>
> Some enlightenment is appreciated.
>
> The following two examples are directly from Todd Lammle's CCNA book, 2nd
> edition. Pages 140 and 141.
>
> 1st example:
>
> Given a network address of: 192.168.10.0
>
> Given a subnet mask: 255.255.255.192 <---- Where does this 192 come
from?
>
> I understand that 192 = 11000000
> And I understand that there are 2 subnets and 62 hosts and how to
calculate
> both of these values. I would just like to know where the 192 comes from
> and some
> explanation of its purpose.
>
> 2nd example:
>
> Given the same network address: 192.168.10.0
>
> Given the subnet mask: 255.255.255.224 <---- So where does the 224 come
> from?
>
> I understand that 224 = 11100000
> And that there are 6 subnets and 30 hosts. Again where does the value
224
> come from and its purpose.
>
> What determines the selection of these two, 192 and 224, values or any of
> the others that are plugged in. I am not talking about the 255 values.
> Those I understand,11111111.
>
> Constructive feedback would be genuinely appreciated.
>
> [EMAIL PROTECTED]
>
>
>
>
>
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