A |
Host Address, Used for storing an IP address (specifically, an IPv4
32-bit address) associated with a domain name. Defined in
RFC 1035 |
AAAA |
IPv6
address. Used for storing an IPv6 128-bit address
associated with a domain name. Defined in RFC 3596 |
CNAME |
Canonical
name for a DNS alias. Note that if a domain name has
a CNAME record associated with it, then it can not have any
other record types. In addition, CNAME records should not
point to domain names which themselves have associated CNAME
records, so CNAME only provides one layer of indirection.
Defined in RFC 1035. |
MX |
Mail
Exchanger. Each MX record specifies a domain name
(which must have an A record associated with it) and a priority;
a list of mail exchangers is then ordered by priority when
delivering mail. MX records provide one level of indirection
in mapping the domain part of an email address to a list of
host names which are meant to receive mail for that domain
name. Critical part of the infrastructure used to support
SMTP email. Defined in RFC 1035 |
NS |
Authoritative
name server. Specifies a host name (which must have
an A record associated with it), where DNS information can
be found about the domain name to which the NS record is attached.
NS records are the basic infrastructure on which DNS is built;
they stitch together distributed zone files into a directed
graph that can be efficiently searched. Defined in RFC 1035 |
PTR |
Domain
name pointer. Provides a general indirection facility
for DNS records. Most often used to provide a way to associate
a domain name with an IPv4 address in the IN-ADDR.ARPA domain.
Defined in RFC 1035 |
SOA |
Start
of authority. Marks the start of a zone. Defined
in RFC 1035
|
TXT |
Text
string. Arbitrary binary data, up to 255 bytes
in length. Defined in RFC 1035
|
AXFR |
Transfer
entire zone file from the master name server to secondary
name servers. Defined in RFC 1035 |
