A record (Address Record) points a domain to an IP address. For example, if your server IP is 111.222.333.44, you can use an A record to point your domain “example.com” ( indicated using @ ) to your server like this:
If you want to point a subdomain (“www”; “blog”; “store”…) to your server.
If you want to point all of the subdomains to your server, use ” * “.
A CNAME (Canonical Name) points one domain or subdomain to another domain name. If you already have your root domain (example.com) point at your server, you can use CNAME to point other subdomains at “example.com”.
An MX Entry (Mail Exchanger) directs email to a particular mail server. Like a CNAME, MX Entries must point to a domain and never point directly to an IP address.
These three records are the most commonly used. In fact, you only need to use these for your blog. I will introduce the other three just to make this list complete.
A TXT (Text) record was originally intended for human-readable text. These records are dynamic and can be used for several purposes.
TTX records are usually used to provide extra information to outside sources.
An SRV (Service) record points one domain to another domain name using a specific destination port. SRV records allow specific services, such as VOIP or IM, to be be directed to a separate location.
The AAAA record is similar to the A record, but it allows you to point the domain to an Ipv6 address. More information on IPv6 can be found at http://ipv6.com/.