#!/usr/bin/perl
use strict;
use warnings;
use Data::Dumper;

my $VAR1 = [
          'snmp-server host 10.234.171.38 abcd
snmp-server host 10.234.171.39 abcd
snmp-server host 10.234.171.40 abcd
!snmp-server host 10.10.10.1 xyz
!'
        ];

my $result_1;
for (split /(?<=\n)/, $VAR1->[0]) {
    next unless /^\Qsnmp-server host\E/;
    $result_1 .= $_;
}
print "---Result 1---\n$result_1\n\n";