| About DNS |
| The Domain Name System (DNS) is a hierarchical naming system for computers, services, or any resource connected to the Internet or a private network. It associates various information with domain names assigned to each of the participants. Most importantly, it translates domain names meaningful to humans into the numerical (binary) identifiers associated with networking equipment for the purpose of locating and addressing these devices worldwide. An often used analogy to explain the Domain Name System is that it serves as the "phone book" for the Internet by translating human-friendly computer hostnames into IP addresses. For example, www.example.com translates to 208.77.188.166. |
| SOA record
The first record of each database file is the SOA record (Start of Authority).The SOA record indicates that this Name Server is the best source of information for the hosts in this domain. |
| A record (Address).
We can say that record is the most important function, since this constitutes the IP address of each host and consists of 32 bits. Each Internet host has a unique IP address so that other machines can connect to it. |
| MX record.
The second most important would be the MX record (Mail Exchance). This is going to specify the domain name ready to receive email. Each MX record point to the A record. |
| NS record. This record we specify the server name. |
| Cname record. When a Name Server looks for a name and finds a corresponding CNAME record, replace the name with the host name of first order and still looking for the new name. |
| PTR record. In practice associate a name with an IP address. |
| HINFO record. We can see the description of equipment and operating system dominance. |
| TXT record. Text, allows us to identify domains. |
