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  1. or download this
    my $QNAME= "www.google.com"; 
 
...
   $QNAME_packed .= pack( 'C', length($part) ) . $part;
}
$QNAME_packed .= pack('C', 0)
  2. or download this
    my $QNAME= "www.google.com"; 
 
...
   $QNAME_packed .= pack( 'C/a*', $part );
}
$QNAME_packed .= pack('C', 0)
  3. or download this
    my $QNAME= "www.google.com"; 
 
...
for my $part ( split( /\./, $QNAME ), '' ) {
   $QNAME_packed .= pack( 'C/a*', $part );
}
  4. or download this
    my $QNAME= "www.google.com"; 
 
my $QNAME_packed = pack( '(C/a*)*', split( /\./, $QNAME ), '' ) );