Answer:
DNS stand for the domain name system and it is used to convert the IP address into the readable system. It basically used to store the data and link with the domain name and the IP address when it is requested.
DNS are important because there is no requirement of memorizing the IP address of huge number of websites and host computer. We only need to remember the domain name of that particular website as it save the IP address of all the particular websites.
In network architecture, the domain name system is very essential and important part.