DNS records- Categories of Data Stored in the DNS

The Dns records are the most vital records for a domain to get resolution to it’s exact server. Here are some of the important categories of data stored in the DNS.

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* A record :-> An A record or address record maps a hostname to a 32-bit IPv4 address.

* CNAME record :-> A CNAME record or canonical name record makes one domain name an alias of another. The aliased domain gets all the subdomains and DNS records of the original.

* MX record :-> An MX record or mail exchange record maps a domain name to a list of mail exchange servers for that domain.

* PTR record :-> A PTR record or pointer record maps an IPv4 address to the canonical name for that host. Setting up a PTR record for a hostname in the in-addr.arpa domain that corresponds to an IP address implements reverse DNS lookup for that address.

* NS record :-> An NS record or name server record maps a domain name to a list of DNS servers authoritative for that domain. Delegations depend on NS records.

* SOA record :-> An SOA record or start of authority record denote the DNS server providing authoritative information about an Internet domain, the email of the domain administrator, the domain serial number,and several timers relating to refreshing the zone.

* SRV record :-> An SRV record is a comprehensive service location record. 

* TXT record :-> A TXT record enable administrator to insert arbitrary text into a DNS record. For example, this record is used to implement the Sender Policy Framework and DomainKeys specifications.

* NAPTR record :-> NAPTR records (NAPTR stands for “Naming Authority Pointer”) are a newer type of DNS record that support regular expression based rewriting.

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* AAAA record :-> An AAAA record or IPv6 address record maps a hostname to a 128-bit IPv6 address.

   The DNS as well contains numerous other records but the on top of mentioned are some of the important records.