How to point a sub.domain from one server to another sub2.domain of different server?

How can I configure my DNS/anything else so that I can point my subdomain (test.domain.com) to point to (show contents of) different subdomain (test.example.com) hosted elsewhere with a different IP address.

So that when users visit test.domain.com, what they actually see is content of test.example.com

I'm not looking for redirection here.

Thanks
Anil