[NTLK] IPv4 v IPv6

Aaron Brigati abrigati at gmail.com
Wed Feb 2 22:55:21 EST 2011

It WILL matter to Newtons if you use them to access the *Internet*.

On your LAN, to synch with your computer? Sure, your LAN will still be IPv4. No problems there.

But eventually you're going to see IPv6 addresses returned from DNS servers.

So someday your Newton will ask 'May I have a-web-site.com, please?' and instead of 'Go to' it will get an answer like 'Go to 2001:0db8:85a3:0000:0000:8a2e:0370:7334' and the Newton will go '... what?'

IPv4 addresses are running out. There will be things that only have IPv6 addresses. Devices that only understand IPv4 will not be able to access things that only have IPv6 addresses without some sort of proxy.

It's possible some home routers might implement an IPv4 to IPv6 proxy, but none of mine do. They'll route IPv6, but not attempt to translate IPv6 outside the LAN to IPv4 inside.

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