If you're using a UN*X host, or have convenient access to one, check now to see if Dig is available on your system. If so, try it out. Use some of the demonstration queries, and then make up some of your own. Lookup the IP address of your local host. Track how this information is obtained by disabling recursion and demanding authoriative answers (Dig options +norecurse and +aa), which renders caches effectively invisible.
Click here to use FreeSoft's Web Dig, then come Back here.
Questions? Click here to send me some email.
Now, click here to continue.