Q: What constitutes a Fail result?
A: Traffic to example.net is forwarded to www.example.net. The purpose of no-www is to advocate the use of domains without the www subdomain.
Q: What is Class A?
A: This is the most common no-www compliance level. With class A domains, example.net and www.example.net are both valid methods of reaching this website. Many servers default to this. It allows users who don't type in the www to access a website without being forwarded to a different hostname.
Q: What is Class B?
A: Class B is the optimal no-www compliance level. In Class B, www.example.net is a valid address, but it redirects all traffic to example.net. This classification actively reminds users that, while the www subdomain is accepted, it is not necessary.
Q: What is Class C?
A: Class C is the most stringent compliance level. In this class, www.example.net is an invalid subdomain. All traffic must go to example.net in order to view the site. Very few sites currently hold this classification, partially because many internet users are not yet savvy enough to drop the www every time. For that reason, this classification is not recommended for sites that serve the general public.
Q: Why are some domains N/A?
A: The no-www standard does not apply to certain domains. In these instances, traffic to example.net may be directed to a different host such as example.co.uk or it might contain different content than the www. version.
Q: How can I become Class B?
A: It's a fairly simple process, actually.
Create a file called .htaccess and paste the following lines, changing the domain name to match that of your site: