Tipologie of record

To a name DNS various types of information can correspond. For this reason, various types of record DNS exist. Every voice of database the DNS must be characterized from a type. The main types are:

* Most common it is the so-called record "To", that it indicates the correspondence between a name and one (or more) IP addresses (for the precision you address IPv4, that is the version currently in use).
* The records of type "MX" (Mail eXchange) indicate to which serveur must be sended the e-mail for a sure dominion.
* The records of type "CNAME" are used in order to create a alias, that is in order to make so that the same calculating is famous with more names. The main scope of such record is that one of being able to give of the names to of the services, therefore from being able to catch up the same service without having by force to know the machine (its name or its IP address) on which it is accommodated.
* The DNS comes used also in order to realize the inverse resolution, that is in order to make to correspond to an IP address the correspondent name to dominion. For this the records of type "PTR" are used (and an appropriate zone of the space of the names in-addr.arpa).
* The IPv6 addresses are record with record of type "AAAA" (this to you recall that a IPv6 address is 4 times longer than a IPv4 address).
* The records of type "SRV" serve to identify the serveur for a determined service to the inside of a dominion. They can be considers you one generalization of records MX.

There are also types of records "of service", necessary to the distributed operation of the database:

* Records "NS" (Name Serveur) are use you in order to indicate which are serveur DNS autoritati you for a sure dominion, that is in order to delegate of the management.
* Records "SOA" (Start of Authority) are used for the management of zones DNS.

In the DNS other types of record can be immessi, some folkloristic ones, like "LOC", used (little) in order to bring back the geographic coordinates of a situated one, others add emergency functions in order to avoid manomissioni.