Connected: An Internet Encyclopedia
2.4.1. RRset Exists (Value Independent)

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2.4.1. RRset Exists (Value Independent)

2.4.1. RRset Exists (Value Independent)

At least one RR with a specified NAME and TYPE (in the zone and class specified in the Zone Section) must exist.

For this prerequisite, a requestor adds to the section a single RR whose NAME and TYPE are equal to that of the zone RRset whose existence is required. RDLENGTH is zero and RDATA is therefore empty. CLASS must be specified as ANY to differentiate this condition from that of an actual RR whose RDLENGTH is naturally zero (0) (e.g., NULL). TTL is specified as zero (0).


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Connected: An Internet Encyclopedia
2.4.1. RRset Exists (Value Independent)