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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:
- It translates meaningful domain names into the numerical IP addresses, which is needed for the purpose of locating computer services and devices world wide.
- It serves as the phone book for the Internet by translating human friendly computer host names into IP addresses.
- The DNS can be quickly updated, allowing a service’s location on the network to change without affecting the end users.
- It distributes the responsibility of assigning domain names and mapping those names to IP addresses by designating authoritative names servers for each domain.
- It also specifies the technical functionality of 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).