Now, let us move on to the last lecture of the DNS server in this lecture.
We are going to see the different types of the DNS.
Not the first type is a dynamic DNS.
At one time, all the DNS records had to be manually entered into the DNS over and then edited manually,
then changes.
For example, earlier, let's say there were 10 websites and there were 10 domain names and there were
10 IP addresses.
It was simple at that time.
Right.
But to date, there are millions of Web site on the Internet and the DNS administrator can just add
and remove and delete and update their DNS records manually.
It is a lot of tedious task to do all those things manually.
And therefore, today, domain name server is a dynamic server and works in concert with the LCP function.
Hosts register their names with their DNS server as they receive their IP address configuration from
the DHC server.
Some older operating systems are not capable of self registrations, for example, Windows XP, but
the DCP server can even be configured to perform the registration on behalf of these clients with their
DNS server.
This doesn't mean that manual records cannot be created if desired.
In fact, some of the record types that we have discussed should be created manually.
That is the IMEX record and the C name record.
That is the canonical name record.
The next type of the DNS is internal and external DNS DNS servers can be located in the demilitarized
zone.
We have seen earlier or inside the Internet, as you can see on the screen.
When located in the demilitarized zone, the DNS servers will only contain the records of the devices
that are placed inside the DMZ, implementing separate internal and external DNS servers might require
you to include external resource records.
Now, you need to know this.
When the Active Directory for its truth uses the same DNS name as the external network, or when you
want to reference the externally accessible resources by their true IP addresses.
Well, don't worry.
This is a lot of things you actually don't need to know the different types of DNS.
I just told you because it is my duty to provide all the knowledge that is required for you to conduct
your interviews.
Well, that's it, folks, we have successfully completed the networking devices of DNS servers.
Wait, wait, wait.
There are other networking devices as well, but those are pretty simple.
And you just need to understand the basic working behind them.
Again, if you are really enjoying this, cause I would like to request you to please read our course,
and I'm waiting for your rating to be appeared on the screen.
So in the next lecture, I will tell you of one of the most interesting servers that we keep using all
the time.
That is the proxy server.