What is DNS?

DNS (Domain Name System) is a system of domain names, for obtaining, storing and updating information about domains.

DNS work is important, because it allows you to turn the alphabetic address of a site into its IP address.
A distributed DNS database is supported based on a specific protocol that is used by DNS servers.
The view of the hierarchical structure of a domain name is based on an understanding of how DNS servers interact with each other.
Any server that is responsible for the name has the right to delegate responsibility for a further part of the domain to another server. This allows you to assign responsibility for the relevance of information to the servers of different companies and organizations.

For example, the server responsible for the .com zone can delegate responsibility for the microsoft.com domain to another server.
Since 2010, the integrity of data transfer between DNS servers is verified by cryptographic methods, but the data itself is not encrypted, and is still transmitted in clear form.
Thus, DNS has the following characteristics: