When initially installing and configuring Windows DNS server, one of the first tasks to perform is the creation of forward lookup zones (and possibly reverse lookup zones).In plain speak, this is when the domains that will be served by this DNS server will be configured.
XX#53 Non-authoritative answer: 184.108.40.206.(SES) name = Reverse DNS is setup by configuring PTR records (Pointer Records) on your DNS server.
The Active Directory Installation wizard offers to install DNS if the wizard does not detect a proper DNS zone configuration during the installation of Active Directory.
However, you should not rely on the wizard for these tasks.
At this point the DNS server contains no information and is only able to look up remotely configured names and addresses.
However, it is authoritative for the testing.local (or whatever zone name the reader configured) domain and records can be created that can be used both locally and remotely depending on the network configuration.