RR stands for resource records.
4.2 Transport RFC 1035
####Following RR definitions are expected to occur, at leat potentially, in all classes.
| RR Name | Are | Cool |
|---|---|---|
| NS | Name server | an authoritative name server |
| SOA | Start of Authority | marks the start of a zone of authority |
| CNAME | canonical name | the canonical name for an alias |
| PTR | pointer | a domain name pointer |