The usual text representation of a record is just the five data fields, separated by a number of spaces, i.e.:įor example, an A record simply has the IP address of the server as its RR data, so a representation of the A record of which can be cached for one day, can be:īecause IN is the only class value used nowadays, it is often omitted. RRTYPE - The type of data the record contains.This is currently always IN, or the Internet. CLASS - Mainly of historic interest this is the context the RR is defined in. In text representation, the usual Numerical value shortcuts can be used. TTL - The amount of time a Caching DNS server may store the record, in seconds.NAME - The domain name the record is ‘attached to’.An A record attached to the domain name thus gives the address of that domain name.Ī resource record is actually a set of five things: For example, an A record is used to specify an address of a domain name. Each RR is said to be ‘attached’ to a domain name, which is what gives the record meaning. There are various types of RRs to do this. Resource Records (RRs) are the fundamental building blocks of the Domain Name System: all information contained in it is stored in RRs.
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