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Creating a new DNS domain
The Domain Name System (DNS) is a hierarchical distributed naming system for computers, services, or any resource connected to the Internet or a private network. It associates various information with domain names assigned to each of the participating entities. The domain name space consists of a tree of domain names. Each node or leaf in the tree has zero or more resource records, which hold information associated with the domain name.
Moving host and pointer records from parent to child DNS domain
The A record, also known as a host record or a DNS host, is a record in your domain's DNS zone file that makes the connection between your domain and its matching IP address. PTR (pointer) records are the reverse of A records: whereas the latter maps names to addresses, PTR addresses map addresses to names.
Changing the client's default DNS server and IP address
When NSLOOKUP starts, before anything else, it checks the computer's network configuration to determine the IP address of the DNS server that the computer uses.
Then it does a reverse DNS lookup on that IP address to determine the name of the DNS server.
If reverse DNS for that IP address is not setup correctly, then NSLOOKUP cannot determine the name associated with the IP address
Configuring the client with the new primary DNS suffix
The Primary Suffix is an element of the Domain Name System that identifies your computer on a network. Each computer has an identifying name and number, Domain Name System(DNS), assigned to it. The Primary Suffix is an additional number that a user or network administrator can assign to identify the computer within a smaller network, like in a computer lab or a home. The Primary Suffix is present in your computer's Windows configuration.