You can use XML::Twig for parsing that XML tree:

#!/usr/bin/perl

use strict;
use warnings;

use XML::Twig;

my $twig = XML::Twig->new(
        twig_handlers => {
                'server' => sub {
                        print "server: ", $_->first_child('name')->tex
+t, "\n";
                        foreach my $c ($_->children('file')) {
                                print "filename: ", $_->text, "\n" for
+each $c->children('filename');
                        }
                },
        },
);
$twig->parse(*DATA);

__DATA__
<config>
    <server>
        <name>server1</name>
        <file>
            <filename>/etc/named.conf</filename>
            <filename>/etc/nsswitch.conf</filename>
        </file>
    </server>
    <server>
        <name>server2</name>
        <file>
            <filename>/etc/named.conf</filename>
            <filename>/etc/nsswitch.conf</filename>
            <filename>/etc/hosts</filename>
        </file>
    </server>
</config>
[download]

Outputs:

server: server1
filename: /etc/named.conf
filename: /etc/nsswitch.conf
server: server2
filename: /etc/named.conf
filename: /etc/nsswitch.conf
filename: /etc/hosts
[download]

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