16again wrote:https://technet.microsoft.com/en-us/library/dd197552(WS.10).aspx
The DNS Client service queries the DNS servers in the following order: 1. The DNS Client service sends the name query to the first DNS server on
the preferred adapter’s list of DNS servers and waits one second for a response. 2. If the DNS Client service does not receive a response from the first DNS server
within one second, it sends the name query to the first DNS servers on all
adapters that are still under consideration and waits two seconds for a response.
......
You're making my point for me. If you read the whole thing, it confirms what I said. From the same article you linked:
The DNS Client service keeps track of which servers answer name queries more quickly, and it moves servers up or down on the list based on how quickly they reply to name queries.
But this is getting a bit off topic. Point is, you can't rely on the client ALWAYS querying the first DNS server listed.