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Re[2]: national security

2003-11-28 07:16:56
Jari Arkko writes:

However, I do not believe these proposals consume any
more address space than, say, manual or EUI-64
based address assignment.

In order to use the full potential address space, you must devise a
scheme that allocates every single combination of bits.  The simplest
scheme of this kind is sequential allocation of addresses.

There's still just one address consumed per
node.

It's not the number consumed; it's the number excluded from availability
by the encoding of information into the address field.  You might easily
waste 99% of the address space in this way.

Perhaps you were thinking that the address contains a MAC field?

No.  I'm thinking that the address field is being divided into zones,
thus wasting a tremendous amount of space.

A 128-bit field contains 2^128 addresses.  If you divide that into two
64-bit fields, you may get as few as 2^64*2 addresses; that's 18
million trillion times smaller than the 128-bit field.






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