does the complete url stay on a CNAME alias

Question

Hi

domain.com       A       IP
www.domain.com       CNAME   domain.com

In this scenario would www.domain.com/foo/bar point to domain.com/foo/bar?

Would the url still be www.domain.com/foo/bar

Thanks

Answer 1

The URL will stay the same. On DNS level your URL will be mapped to the same IP address as it is known for domain.com

So you will receive a request from www.domain.com

If you change the underlying IP address of domain.com it will automatically reflect to the CNAME alias www.domain.com

Answer 2

In this scenario, requests to http://www.domain.com/ and http://domain.com/ would connect to the same IP address but would use two distinct host names: www.domain.com and domain.com respectively.

There wouldn't be a redirection from http://domain.com/ to http://www.domain.com/ (or the other way around) unless the server was configured to do so (but this isn't directly linked to the DNS configuration, rather it's about the configuration of the HTTP server).