[TriLUG] OT: IP subnetting question

[Reginald Reed]

The network itself is the one you are missing.

On Tue, Aug 9, 2011 at 2:48 PM, Brian Henning <bhenning at pineinst.com> wrote:
> Hi Folks:
>
> I just worked out a contract with a service provider for internet service.
> I noticed that they offered the following static IP packages:
>
> /30, 1 useable address
> /29, 5 useable addresses
> /28, 13 useable addresses
>
> My question is: For each of those, that leaves three "unuseable" addresses.
> What are they for?  I made some guesses:
>
> - broadcast address (all ones)
> - ?????????         (all zeros) (does this have a name?)
> - Modem's own address
>
> Thanks for the input!
> ~Brian
>
> ------------------------------------------------------
>          Brian Henning, Software Engineer
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