Enums
- Errors returned from trying to turn a String into a ContactDetails
- A four bit field that specifies kind of query in this message. This value is set by the originator of a query and copied into the response.
- Response code, things like NOERROR, FORMATERROR, SERVFAIL etc.
- CLASS fields appear in resource records, most entries should be IN, but CHAOS is typically used for management-layer things. Ref RFC1035 3.2.4.
- RRType, eg A, NS, MX, etc