Internet Domain Name System (DNS)

SOA	Zone	Info about represented zone
A	Host	Host IP address of represented node.
MX	Domain	Node's email server.
SRV	Domain	Service dedicated server.
NS	Zone	Server with name for the represented zone.
CNAME	Node	Symbolic pointer.
PTR	Host	Host's canonical name.
HINFO	Host	Information about the host.
TXT	Any kind	Any information considered useful.