1. It's Mac, not MAC. "Mac" is short for Macintosh. "MAC" is an acronym for media access control, machine access code, or message authentication code, but not Macintosh.
2. Run "lookupd -d" in the Terminal window to get a special prompt. Then, enter the command "allHosts" to show details. Enter the command "exit" to return to your shell.
update: Err, scratch that. This only shows hosts stored locally as in your /etc/hosts file.
update 2: Sorry, I couldn't find anything else. Hopefully someone else can help.
3. Welcome to AppleNova.