[Gllug] subnetting

[Jason Clifford]

On Sun, 7 Nov 2004, Michael Jenson wrote:

> Well OK I should know this I feel, but I don't! 
> Can someone send URL or explain why the first range of IP's 
> in subnetting is not used and what would make it possible to
> use it. Example:
> Taking 7 bits away makes for 8 subnets. How can I make the 
> first subnet usable for a customer. 
> Need for university assignment.

You have not expressed yourself clearly - I'm not sure I understand your 
question as you intend. Do you mean to ask why the first address within a 
subnet cannot be used for a host address?

If so the reason is that the first address identifies the whole network - 
hence it's called the network address.

Jason Clifford
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