How to separate a domain and a subdomain into different servers?

Question

PHP

Good afternoon. Please tell me the scheme for implementing the separation of the domain and subdomain on different servers.
Those. so that the site on the subdomain lies on one server, and the main domain with its site on another.

Answer 1

Add an entry
domain.com - A - xxxx
sub.domain.com - A - xxxx
Where domain.com is the main domain, sub.domain.com is the subdomain, A is the record type, xxxx is the server address

Answer 2

And what exactly is the problem?
Add a type A record to the DNS indicating which IP address the subdomain should refer to.