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DNS Client Architecture

Solaris system utilities that access DNS do so by using the resolver on the client. The resolver is actually a set of library routines that perform various types of queries. These queries get information about the location of the DNS servers by looking in the /etc/resolv.conf file. The following shows the format of this file:

As you can see, more than one DNS server can be specified. In normal operation the resolver tries to contact the first server in the list. If contact cannot be established, the second server is tried, then the third. The current limit in the Solaris operating environment is three.

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