Users who use non-Google DNS Server, would they get the benefit of Cloud DNS?

[WaiKeat]

As I read here, it appears most DR/HA design-pattern is that Google CloudDNS would has the ability to resolve the name automatically to either IP of on-prem system or IP of GCP environment, and this is basically one of the gist things can work flawlessly.

I am wondering however, if let's say DR happened, imagine a user that has their DNS to be 8.8.4.4 or 8.8.8.8 (or any Google DNS Server), so no problem for this customer.

How about users who just happen to use non-Google DNS Server? or maybe their ISP doesn't use Google's? 

I suppose Google is powering most of the DNS Server on earth nowadays, but I am just curious what happen to those.....'minority' unlucky few who doesn't use Google DNS? Does that means they won't be able to access the website? (since they're still accessing on-prem's instead of GCP's)

Or it'll still just work fine too? (means I still have some homework to do on understanding more about basic of how DNS)

Best Regards,

Wai Keat

[julien_furgerot · Accepted solution]

Hi WaiKeat,

All public DNS servers are interconnected, with each responsible to resolve
some domain.

Let's say you are using Google Cloud DNS to manage the domain "exemple.com".
Google DNS is said to be authoritative for this domain.
When someone asks their non-Google DNS server for "www.exemple.com", this
server will forward the query to the authoritative server, here Cloud DNS.