Information Technology Reference
In-Depth Information
Creating and coniguring DNS resource records
The DNS server in Windows Server supports a very wide variety of resource records, but the
ones that most people have to deal with are the following:
A An IPv4 host address record. The A record is a forward lookup record that
translates a host name into an IPv4 address.
AAAA An IPv6 host address record. The AAAA record is a forward lookup record
that translates a host name into an IPv6 address.
CName A canonical name record. The CName record allows the use of more than
one resource record to refer to a single host.
MX A Mail Exchanger record. The MX record identifies the email server for a
domain. There can be multiple MX records for a domain, and they are used in order of
precedence.
NS A Name Server record. The NS record identifies a name server for the domain.
There can be multiple NS records in a domain.
PTR A pointer record. The PTR record is a reverse lookup record that translates an IP
address into a host name. PTR records can be IPv4 or IPv6 addresses.
SOA A Start of Authority record. The SOA record is a version number record
identifying the version number of the DNS zone.
SRV A Service record. The SRV record identifies the host name and port number of
servers for the specified service.
All these resource records can be created or generated in the DNS Management console.
They can also be created or generated by using Windows PowerShell, with the exception of
the SOA record, which can't be directly manipulated by Windows PowerShell. You can use the
general Add-DnsServerResourceRecord or Set-DnsServerResourceRecord for all the resource
records listed except the SOA record, plus there are specific Add cmdlets for the A, AAAA,
CName, MX, and PTR records.
There are a wide variety of other DNS record types, but they are rarely of concern on
typical Windows networks and they are not called out in the description for this objective, so
they are unlikely to be on the exam.
The procedure for setting these record types is essentially the same for all except the SOA
and NS records.
Creating A resource records
The A resource record is a host address record that points to an IPv4 address. DNS clients
query the DNS server with a name, and if it matches an A record, the DNS server returns an
IPv4 address. You can create an A record with either the DNS Manager console or by using
the Add-DnsServerResourceRecordA or Add-DnsServerResourceRecord cmdlet.
In most DHCP-managed networks, the A record is usually automatically generated when
the IPv4 address is handed out to the DHCP client. This is the preferred method for DHCP
 
 
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