These are three types of zones in active directory 2008, which are forward lookup zones, reverse lookup zone and conditional forwarders.
Primary zone is the read write copy of zone, this mean that if this zone answers the query then it is an authoritative answer.
To understand stub zone suppose you have users in your network which are continuously accessing your business partner’s network, printer and other resources and this network is not manage by you.
Creating primary DNS zone in active directory is straightforward, open DNS from Administrative Tool. Reverse lookup zone allows the client to get the name of the corresponding IP address by querying, in reverse lookup zone we can create the PTR (Pointer) again any host. Domain Name Service (DNS) is a Naming service that maps IP addresses and fully qualified domain names to one another. Here I have installed and configured cache server using forwarder, forward look-up and reserve look-up.

The (.) represent the namespace Root server, there are total 13 root servers globally available.
While the domain registration, our domain registerer will define which authoritative name-server should our domain use. First, take a look at the my local DNS server information such as static IP address and hostname, which is used to for this article purpose. Next, we update the default repositories and do a system upgrade, before setting-up DNS cache server. If we need to test whether caching works, we can use dig command and check whether the cache working or not. While we do a reverse look-up using an ip address as shown above, it want to reply with a name as above image shows. Understanding zone file entry in dns, This image will give you a small explanation what we have defined in zone file entry.

Soon you can read about the article how to troubleshoot a DNS server using various tool and fix it. I'm Working as a System Administrator for last 10 year's with 4 years experience with Linux Distributions, fall in love with text based operating systems.
Then right click on forward lookup zone and click on new zone, click next to start this wizard.
In other word condition forwarder tells the DNS server that if you got the query for particular IP subnet then forwards this request to specific DNS server. Then it good to create a stub zone for these queries, which only contain the enough information to send your client to your partner’s DNS so that other DNS resolve your client queries.

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