When querying DNS servers, we want to obtain many records, including:

NS: Nameserver records
A: Address record
HINFO: Host Information record
MX: Mail exchange record
TXT: Text record
CNAME: Canonical Name Record
SOA: Start of Authority record
RP: Responsible person record
PTR: Pointer for inverse lookups record
SVR: Service location record

More details about some of these will be provided in a different posts. In the meantime, suffice to say that name servers do more than just resolve domain names to IP addresses.