DNS or Domain Name Space is the largest internet system about which you may already know. It is used to convert Domain Names into the numeric forms which are specifically called IP Addresses. As you may already know that every domain name has uniques address, in this case, DNS helps machines to understand which web page user wants to visit. So now you have clearly got an idea what is DNS? Further, you will know How DNS zone work.
In this page, you are going to learn What is DNS Zone and How DNS Zone work. DNS Zones is an important term which is related to DNS without any doubt. We are also going to short out some important frequently asked questions so that you go from here with full DNS Zone information.
What is DNS Zone?
Domain Name Space is partitioned into many blocks called zones (DNS Zones). Every Domain has many sub-domains and to manage all the sub-domains DNS Zones are used. DNS zone contains all the sub-domain of the same level. Let’s learn How DNS Zone works with an example.
Also Read: Best Free DNS Servers
How does DNS Zone work?
Let’s take a root Domain as YTECHB.com which is further categorized into many subdomains such as android.ytechb.com, windows.ytechb.com, and mac.ytechb.com.
In the image, the domain ytechb.com is further categorized into three subdomains. All the three domains will come under one DNS zone. And similarly for android.ytechb.com which is classified in other two low-level sub-domains which will come under another DNS Zone.
Note: We can not create a zone which contains nougat.android.ytechb.com and mac.ytechb.com together because they are not contiguous.
How DNS Zone Work?
DNS Zones helps to group the domains and sub-domains for the easy data storage. And each zone has its own zone file. So now you have understood how Zones are divided in the hierarchy and How DNS Zone work. And you may be now wondering What is the Zone file. Below you will find about Zone files.
What is Zone File?
As you have already read that each zone has its own zone file. The zone file is the actual text file which represents the DNS Zone. The zone file contains all the records of the specific Domains in a particular Zone. The Zone file contains various information related to DNS zones like the mapping of Domain names and IP addresses. Zone file holds only one record in one line in text file.
DNS Zone file always contains the SOA (start of authority) section which contains important information such as contact information for the zone administrator. And always the DNS Zone file starts with TTL which shows the time interval to keep the record in the DNS server cache. However, We can also flush the DNS cache so let’s see how to do it.
How to flush DNS cache?
Flushing DNS cache is nothing but it is the clearing DNS cache from different systems. So why do we need to flush DNS cache? well, sometimes the file leaves the outdated cache which displays an error when we try to visit sites. So if you want to prevent the error you need to clear out DNS cache on Windows, Mac or Linux system. You can follow up the tutorial How to Flush DNS cache to clear out all DNS cache on your system.
What is DNS Zone Transfer?
DNS Zone transfer is the process of copying the changed data from primary DNS zone to the Secondary DNS zone. This usually happens when the administrator made some changes in master Zone or Primary zone. A copy of every update or changes in Master zone is required to send to the slave zone or secondary zone. It is required because if the Master Zone goes down the slave zone can cover it.
So these were the main terms related to DNS zone which you need to know. If you need any information in detail we are always available for help. So you can comment down or reach up to us on facebook or other social media.