DNS Records
Posted by admin | Posted in Business Web Hosting | Posted on 06-11-2009
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The DNS records are the most important records for a domain to resolve to it’s exact server.Below are some of the important categories of data stored in the DNS :
A record : An A record or address record maps a hostname to a 32-bit IPv4 address.
AAAA record : An AAAA record or IPv6 address record maps a hostname to a 128-bit IPv6 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. For example (at the time of writing), www.icann.net has the IP address 192.0.34.164,but a PTR record maps 164.34.0.192.in-addr.arpa to its cannonical name,referrals.icann.org.
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 specifies 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 generalized service location record.
TXT record : A TXT record allows an 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.
The DNS also contains many other records but the above mentioned are some of the important records.
