IPv6 Records on an IPv4 Network

[Danny Mayer]

On 7/22/2010 11:33 AM, Phil Mayers wrote:
> On 22/07/10 12:19, Rock July wrote:
>> Windows Vista and 7 clients will query both type A and AAAA query even
> 
> The OS might make the query, but the application will (should) be using
> getaddrinfo, and this will return the IPv4 addresses first, so it
> doesn't matter.

This is untrue. IPv6 addresses are normally returned first though the
ordering depends on a) the order returned by the authorative nameserver
and b) by the resolving server and if it reorders the list returned.
There is no specific ordering of resource records specified in the
protocol and servers are free to order them in any way they want. It is
up to the application to specify what they need and to make decisions on
which ones they will use.

Danny