Domain IP address for www and non-www for Canonical URL

Question

To handle Canonical URL is it best practice to do a 301 redirect or better to have the same IP Address for both www and non www domain?

For example:

Canonical UR

Answer 1

You may try redirect.center. Its redirects domains using DNS only.
So it will fulfill your DNS configurations:

Domain           | A Record
------------------------------------
example.com      | 192.0.2.34
*  www.example.com 301 redirect to example.com

set your DNS record to:

CNAME | www | example.com.opts-https.redirect.center

Note:
The .opts-https. parameter redirect to https domain
If you use only http domain then use .opts-uri.