DNS

DNS is the name service provided by the Internet for Transmission Control Protocol/Internet Protocol (TCP/IP) networks. It was developed so that workstations on the network could be identified by common names instead of Internet addresses. DNS is a program that converts domain names to their IP addresses. Without it, users would have to remember numbers instead of words to get around the Internet. The process of finding a computer’s IP address by using its hostname as an index is referred to as name-to-address resolution, or mapping. DNS duplicates some of the information stored in the NIS+ tables, but DNS information is available to all hosts on the network.

The collection of networked systems that use DNS is referred to as the DNS namespace. ...

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