There several types of records, but essential one are described below:
- A records - is main records used in the domain name system. A records is direct pointers from names to ip, for example "abc.com --> 10.10.10.55".
- CNAME - is used for mapping a non-numercal to the master domain also referred as "ALIAS". For example, www.abc.com --> abc.com.
- MX - is for priortising the Mail Sever Exchange.
- NS - is to set the NAME SERVER pointer, basically tells where to look for the records.