I know my question is a newbie answer. I been looking at the websites, but I can't really get a good answer or at least an answer that I can understand. So lets say I type in 'nslookup www.mit.edu'. I get one non-authoritative answer. When I type in 'nslookup -type=nds mit.edu', I get a bunch of non-authoritative answer name servers (8). So what is going is nslookup is sending out a command to my local dns to get all the name servers (both non-authoritative and authoritative name servers)?
Can someone let me know I am on the right track.