Go to your browser, type in www.google.com, you get the google home page. Everythings normal there.

Now, change your url, ad a dot (so that it reads www.google.com.) . The page still loads.

This is risky, since it can lead to a duplicate content malus on google, but is perfectly normal DNS behaviour.

The actual FQDN is www.google.com. . It’s just that, to make our lives easier, the last dot is optional.

Unfortunatly, there’s no way to get rid of them (even 301s seem flaky).

That’s all, just so that the next time you see bizzars urls, you have a reason for them all ready for your boss