>CNN in the URL
>security.blogs.cnn.com
The last part of a URL before the .com is the Top level domain name.
If it was fake , cnn wouldn't allow it to exist for more than a few hours.
And I say if , because no-one could register such a domain after it was already taken and registered.
the security. part is a subdomain of blogs. and blogs. is a subdomain of cnn.com.
Real cnn. But of course , fake news still applies to that publisher.