[CentOS] RHEL Subscriptions

On 19.Aug.2013, at 04:30, Anthony K wrote:

> I was recently approached by Dell stating that I HAVE TO renew my Red 
> Hat Subscriptions.


How does Dell know what OS your are running?
Should they know what OS you are running?
Dell provides the hardware only?

I am confused about this. I do not have experiences with Dell, though.
-- 
Markus