DNS Records
A client specifies a type of DNS record with every DNS request.
When changing DNS records at a domain registrar, @ signals the root domain, i.e.
mydomain.com.
Types of DNS records
Host (A and AAAA):
- The 'A' record stores the IPv4 address for a DNS name.
- The Quad A record is used for IPv6.
Alias (CNAME):
- Alternative record or canonical name (hence CNAME).
Mail Exchanger (MX):
- Identifies mail server for DNS name.
Service Record (SRV):
- Location of service on the network.
- Contains the service (e.g. LDAP), target, port and priority
Name Server (NS):
- Contains authority DNS servers for that domain.
Pointer (PTR):
- Maps from IP address to Name, i.e. opposite of
A
Text (TXT):
- Associate arbitrary text with your domain.
and more…