       be specified by preceding the file name with <code class="literal">@</code>.
      </p></dd><dt><span class="term"><em class="replaceable"><code>address</code></em></span></dt><dd><p>
       Specifies the client machine address(es) that this record
       matches.  This field can contain either a host name, an IP
       address range, or one of the special key words mentioned below.
      </p><p>
       An IP address range is specified using standard numeric notation
       for the range's starting a