Versions
The
fourth edition of this book deals with the new 9.1.0 and 8.2.3
versions of BIND as well as the older 4.9 versions. While 9.1.0 and
8.2.3 are the most recent versions as of this writing, they
haven't made their way into many vendors' versions of
Unix yet, partly because both versions have only recently been
released and many vendors are wary of using such new software. We
also occasionally mention other versions of BIND, especially 4.8.3,
because many vendors continue to ship code based on this older
software as part of their Unix products. Whenever a feature is
available only in the 4.9, 8.2.3, or 9.1.0 version, or when there is
a difference in the behavior of the versions, we try to point out
which version does what.
We use nslookup, a name
server utility program, very frequently in our examples. The version
we use is the one shipped with the 8.2.3 BIND code. Older versions of
nslookup provide much, but not quite all, of the
functionality in the 8.2.3 nslookup. We've used commands common to most
nslookup sin most of our
examples; when this was not possible, we tried to note it.
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