DNS resource records provide information about objects and NIOS-X Servers. DNS servers use these records to respond to queries for NIOS-X Servers and objects.

You can perform the following actions:

The following table describes the DNS record sources in Universal DDI, including combined sources.

Record Source	Description	Record Types
Static	Record created manually in UI or by an API call.	All record types except SOA.
Dynamic	Record created automatically by a dynamic DNS update.	All record types except SOA.
System	Record created automatically upon name server assignment or zone creation event.	A, PTR, NS, SOA.
Static, System	A case when a record was created manually, and then, at some point, the zone was assigned to a name server, which resulted in the creation of a System record.	A, PTR, NS, SOA.
Dynamic, System	Record created through a dynamic DNS update, after which the zone was assigned to a name server and corresponding System record was created.	A, PTR, NS, SOA.

You can see those in the Record Source column of the Resource Records Viewer for a specific zone.

Updates to a Static, Dynamic, or System record over API or dynamic DNS do not change the initial record source.

System and combined records have some limitations that include:

You cannot enable or disable System records.
You cannot delete System records.
You cannot modify the record data (RDATA).

Record data fields that are domain names (such as "Canonical Name" of CNAME or "Domain Name" of PTR) can be either relative (to the zone name) or absolute. The value of those fields must therefore be explicitly ended with a period if they are intended to be absolute. Otherwise, the zone name will be appended to the user-supplied name to be absolute.

For more information about Dynamic DNS Updates, see Updates and Enabling DDNS for IPv4 Clients.

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