Thanks for the comment. All the new videos have long description with the video that acts as the notes for the video. Frontally the older ones like this one do not have long descriptions.
1:57 When referring to A records, "This record maps a IP Address to a Name" is correct since the name is the index you are searching on. 6:15 - PTR record maps a Name to an IP Address. Not the other way around. Just pointing this out in case anyone was confused like I was when I heard this. The PTR record is just the reverse of an A record.
We are a free training company and thus do not sell anything. All are products are free. I have had a look at ALL your previous comments. You do not seem to like anything on RU-vid. :(
I'm little bit confused.. Where the exactly dns server hosted and does the records are stored in dns server of user Or the domain server(from where we will be getting the information) like google.Com domain.
The DNS records are stored on the DNS server. It is also possible for other DNS servers to have a copy of another DNS servers records. So google.com would have one server which holds all the DNS records. They then would have a second server that contains a copy of those DNS records. When you attempt to resolve a DNS record for example www.google.com one of the two google DNS servers is contacted to resolve it since they hold the records.
Time can certainly fly by quickly! If you're reflecting on something that happened 11 years ago, it's a reminder of how our lives and circumstances change over time. DNS Records have not really changed that much since than. :)
