You will want the naked and www subdomains to point to the same address in your DNS configuration, and you will want to configure your webserver to issue a 301

You will want the naked and www subdomains to point to the same address in your DNS configuration, and you will want to configure your webserver to issue a 301 redirect to the canonical subdomain at the HTTP layer. There are several reasons for this, but the most pressing is that it does not make sense to use a CNAME record for the naked domain.