Domain Name System (DNS)

LEARNING OBJECTIVES z To understand the need of Domain Name System for proper functioning of Internet z To know the importance of IP addresses z To know the parts of URL and its types z To know the components of Domain name system and its functions z To know how the DNS is working The host computer . . . DNS server Figure .

Domain Name System Chapter DNS (Domain Name System) IP addresses, not domain names. But it is easy to use domain names to refer them rather than the long numbers (IP address). To enable the use of domain names in a network, the Domain Name System (DNS) is used. DNS provides the domain name to IP address mapping through Name servers.

To know more about how DNS works, First we need to know about IP address, URL and DNS components. So, let us see about each in detail. While typing a web address, (e.g., DNS translates it into a machine friendly IP address (for example . .

. ) and directs your Internet connection to the correct website. American computer scientist