Lawrence D'Oliveiro <(E-Mail Removed)_zealand> wrote:

> In message

> <(E-Mail Removed)>, Matty F

> wrote:

>

> > It's a very basic flaw in system design to have a fixed length field

> > that eventually overflows, requiring a huge amount of work to make the

> > field larger, until the next time it overflows again.

>

> Given that IPv6 has room for roughly the same number of addresses as the

> estimated number of atoms in the entire observable Universe
Hardly. 128 bits is about 3e38 IPv6 addresses.

12 grams of carbon-12 contains 6e23 atoms, and the mass of the Earth is

5.9e24 kg (3.5e48 if it was all C-12), so there aren't enough IPv6

addresses for every atom on Earth, let alone the whole universe.

It works out to slightly less than one IPv6 address per square picometre

on Earth's surface. (Earth's surface area being 5.1e8 square

kilometres.)

--

David Empson

http://www.velocityreviews.com/forums/(E-Mail Removed)