Connected: An Internet Encyclopedia
3.2.1. Format

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3.2.1. Format

3.2.1. Format

All RRs have the same top level format shown below:

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NAME

TYPE
CLASS
TTL
TTL
RDLENGTH

RDATA

where:

NAME
an owner name, i.e., the name of the node to which this resource record pertains.
TYPE
two octets containing one of the RR TYPE codes.
CLASS
two octets containing one of the RR CLASS codes.
TTL
a 32 bit signed integer that specifies the time interval that the resource record may be cached before the source of the information should again be consulted. Zero values are interpreted to mean that the RR can only be used for the transaction in progress, and should not be cached. For example, SOA records are always distributed with a zero TTL to prohibit caching. Zero values can also be used for extremely volatile data.
RDLENGTH
an unsigned 16 bit integer that specifies the length in octets of the RDATA field.
RDATA
a variable length string of octets that describes the resource. The format of this information varies according to the TYPE and CLASS of the resource record.


Next: 3.2.2. TYPE values

Connected: An Internet Encyclopedia
3.2.1. Format