Question

What is DNS and also explain its functions? 

Topic	Internet Basics (Computer Applications)
Type	Long Answer Type Questions
Class	10

Answer 1

Ans. DNS stands for Domain Name System. It is a hierarchical distributed naming system for computers, services, or any resources connected to the Internet or a private network.

It associates various information with domain names assigned to each of the participating entities. 

The different functions of DNS are as follows:

1. It translates meaningful domain names into numerical IP addresses, which is needed for the purpose of locating computer services and devices worldwide.
    
2. It serves as the phone book for the Internet by translating human-friendly computer host names into IP addresses. 
    
3. The DNS can be quickly updated, allowing a service’s location on the network to change without affecting the end-users. 
    
4. It distributes the responsibility of assigning domain names and mapping those names to IP addresses by designating authoritative names servers for each domain. 
    
5. It also specifies the technical functionality of the database service. It defines the DNS protocol, a detailed specification of the data structure and data communication exchanges used in DNS, as part of the Internet Protocol Suite (IPS).