use IO::Socket::IP -register;

for my $m (sort(keys(%INC))) {
   print "$m\n"
}

my $sock = IO::Socket->new(
   Domain    => PF_INET6,
   LocalHost => "::1",
   Listen    => 1,
) or die "Cannot create socket - $@\n";

print "Created a socket of type " . ref($sock) . "\n";