vortek wrote:What about the issue of 2 queries being made, both ipv4 and ipv6 at the same time on vista. This could almost double the internet load from windows users who switch to vista. This could have a tremendous problem on the already lagged ns's.
Initially, the impact of additional v6 DNS queries should be minimal since Vista will not do an IPv6 name query unless the client system has a native IPv6 address (i.e. not Teredo). Since very few networks provide v6 addresses, there will be a small number of v6 lookups. Eventually, there will be a pick-up in v6 queries as more 6to4 routers, and native v6 networks, are deployed. However, this should give network providers plenty of time to increase their name server capacity to handle the additional traffic.
Here are details on how Vista IPv6 DNS queries work.