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Domain Description
lookup identifies the hostname. Both zones need to be built, created, and managed by
a system administrator. The reverse lookup zone is contained in a domain known as
in-addr.arpa.
Records
When you??™re building a DNS infrastructure, the hierarchy is pretty straightforward. You
have the TLD, the second-level domain, and a zone database created on the DNS server. A
database is not worth much, of course, without records. Records are nothing more than files
that hold data that the DNS server queries. Each domain that is created always contains
resource records containing information about the DNS infrastructure you are managing,
especially by default. Some records are made by default when you install DNS for the first
time. There are many types of DNS database records. The most common database record is
the A (Address) record, which maps a hostname and an IP address. This is the primary
method of DNS resolution. A records are responsible for most of the DNS communication
and resolution in use with DNS. The DNS forward lookup zones are populated with a
variety of resource records.
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