Before anything else, this article will first define what DNS means. A DNS is just the abbreviation of the words Domain Name System. Other people also call it the name server. It is an internet-based server which is precisely designed to connect with a mammoth sized database that stores all data about domain names and their respective Domain Name System records. These records may comprise of the web host, domain name, registrant’s name, the expiry date, the address of the registrant, registrant’s contact number, and various other details.
All domain names’ DNS servers are stored in the Whois.com database. It is also listed in the web hosting control panel and because of such, domain names are written as NS1.NAMERSERVER.COM or NS2.NAMESERVER.COM. It may sound complicated but actually it is the only way the system works. If you want to learn about DNS servers, you must learn the basics first.
First of all, there are so many DNS servers all over the world. To be exact, there are actually thousands of DNS servers that store pieces of the databases. Despite the numerous number of these DNS servers, there are only thirteen root DNS servers that keep the whole database on each server.
DNS servers actually come into two different types, the primary and the secondary. But you have to remember though that any type of DNS server may be utilized as a primary or a secondary server. It all depends upon the prerogative of the server manager or administrator. It is even alright to have the same DNS server be configured to serve as a primary server for a single zone. The said primary server may also be utilized for a secondary server for another one. If you want to fully utilize the full potential of your servers while being cost efficient then this is the best course of action to take.
When talking about DNS servers, there also the thing called primary master name server. It is the server that is specifically designed to read the information within the domain zone. The information that will be read comes from a file located on from the hosting account’s web server. Said server is normally the one sending data to the secondary server.
Meanwhile, the zone data is the information stipulated by the server manager that commands the server how to function and communicate with various other servers. Whenever a primary master server sends data to a secondary server, the process is then known as a zone transfer since the zone data is the one being moved from one DNS server to another one.
In addition, a secondary DNS server is also known as a slave server or just a slave. The secondary DNS server acquires data from the primary server immediately after the server starts functioning. Whenever a secondary server operates, it then sends a query request from the primary server.
It is, however, important to remember that the secondary server is also as important as primary servers. Yes, they might be called as slave servers but they do provide security since they give security in the form of information redundancy. They also help the primary server through lessening the load of the former and to make sure that there will always be a server operating to deliver the needed information.
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