On your way in you may have missed that we have a policy on screen names here at JavaRanch. Basically, it must consist of a first name, a space, and a last name, and not be obviously fictitious. Since yours does not conform with it, please take a moment to change it, which you can do right here.
As to your question, there seems to be extensive documentation online. What specifically are you wondering about that isn't covered there?
Ping & DNS - updated with new look and Ping home screen widget