DNS stands for Domain name system. The basic purpose of the DNS is to provide the IP or resolve the IP address of the Web site/hostname/domain & vice versa.
In smaller scale we do have /etc/hosts to perform the task of converting the hostname & giving us the respective ip address of the system. However this /etc/system has got some limitations such as,
- As its normal text file can be readable , it’s not encrypted.
- Updating the file is huge task
- To have updated copy of the same you will have to download lasted copy which puts also burden on the network.
Hence to overcome above issues DNS comes into picture.
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