Order of upstream DNS servers

[DL6ER]

I agree with what @jpgpi250 said. The idea that one DNS server might be in favor of another most often originates from the phrases "primary" and "secondary" DNS servers, but this is very misleading. I advice to read e.g. my post here

Primary vs. Secondary DNS

Following the regulations, there is nothing like a primary and secondary DNS server. These indications are quite misleading but many systems adopted it this way. We only list the DNS servers as primary and secondary, because this is what the providers write on their pages. The bad phrasing is supported especially by how Windows handles it. If you look at any Linux distribution, there is usually no separation between primary and secondary, but you can only provide a comma-separated list of DNS se…