Here: http://help.yahoo.com/l/us/yahoo/ipv6/ I stumbled across this page and took the IPv6 test. I'm IPv4 only, even though I bought a new Cisco wireless access point and router just a few weeks ago. Is the router not ready for 6? Is my ISP's DSL modem no ready for 6? Is it something else? In answer to their "What is IPv6 and why is it necessary?" answers, I thought NAT on the consumer side negated the issue of non-unique IP addresses i.e. it was only the supplier (web site) addresses which would bump up against the limit. What's the real answer? Do we need to upgrade all of our equipment, or did NAT negate that?