Important DNS Facts and Concepts

There are several vital DNS facts and concepts. Knowledge of these facts and concepts are essential for fast and effortless configuration of DNS, as well as for effective DNS troubleshooting. The most important are discussed in this section.

The DNS Client and Server Are Distinct

Every network-enabled Linux computer has DNS client software, commonly called the resolver. The DNS client software simply queries its assigned DNS servers in the order they appear in the /etc/resolv.conf file. A computer's DNS client can be assigned a server on the same computer, on another computer, or sometimes on one of each.

DNS servers are machines configured to return query data. The DNS server software relies on the /etc/named.conf ...

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