Help with Network Address Math

Thanks to all that replied to my original question:

Kurt: Thanks for the detailed explanation on IP and netmask computations

Tom: I grabbed the PDF, you can now remove it. Thanks for your help!!

Peter




On 7 Aug 2003 at 13:10, AZ Pete wrote:

> Calling all network gurus :)
>
> My IP network address math is rather rusty (it's been a long time!!). I have need to calculate whether a given client
> IP address is within a given network. Additionally, if there are a list of given networks, which one is the most
> specific. I need the math formulas to calculate these figures for use within an application.
>
> Examples:
> Given the network: 192.168.1.0/24
> Given IP address is: 192.168.1.100
>
> What is the formula to determine if this client's IP address falls within the network's range.
>
> Further example
> Given these networks: 192.168.1.0/24 and 192.168.0.0/16
> and the client IP of: 192.168.1.100
>
> In this case the client's IP falls within both networks. What is the formula to determine which network is the more
> specific one?
>
> Any help would be most appreciated.
> Thanks,
> Peter
> ---------------------------------------------------
> PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us
> To subscribe, unsubscribe, or to change you mail settings:
> http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss