Subject Re: [Firebird-Architect] Digest Number 964
Author Alexandre Benson Smith
Hi David,

David Johnson wrote:

>On Wed, 2005-03-30 at 06:53 +0000,
>>This is a point I didn't understand how do you get an unique ID based
>>MAC or IP Address for unconnected DB's that is guaranteed unique,
>>made with human intervention ?
>MAC (Media Access Controller) address is guaranteed unique for any
>network media device. It is encoded in the EPROM or an electronic
>serial number chip on every network controller device built.
Ok, but Jim are talking about derivating a CPUId (wich will be a "small"
number of bits) from the MAC (also called MAC-48 because use 48bits) or
IP address (32 bits or 64 bits for IPv6).

I was wondering how a 32/48/64bits will be reduced for a range of 16
bits (for example) with the uniqueness guaranteed. Jim said it has a
table with a mapping of MAC/IP Address to CPUId, that answered my question.

See you !


Alexandre Benson Smith
THOR Software e Comercial Ltda.
Santo Andre - Sao Paulo - Brazil

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