reply to steelman
Regarding the free part, please treat 'freely' as in freedom of use, not as in free beer,
So which voip providers are giving away free beer? Plus what brands and quality of beer?
So based on all of THAT :DoS is when the waiter cuts you off after you've had enough to drink.And DDoS is when ALL of the waiters in ALL of the bars won't serve you anymore that night, because they tweet each other about who's been cut off.