Abstract

The Domain Name System (DNS) maps domain names to IP addresses and vice versa. The Domain Name System consist of two pieces, DNS servers and resolvers. Resolvers are client applications which deliver the IP address(es) of a domain name upon request of a user application or operating system. DNS servers receives queries from resolvers and they return the corresponding IP address(es) of the domain name back to clients. The DNS is one of the core protocols of the Internet.

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