Select Code to Download

my %hash = ( network_type_1 => { conn_type_1 => [ 1 ],
                                 conn_type_2 => [ 2 ] },
...
                                 conn_type_2 => [ 4 ] } );
# To get at the elements:
print $hash{ $network }->{ $connection }->[ $pos ];

my %hash = ( 'network-type_1|conn_type_1' => [ 1 ],
             'network-type_1|conn_type_2' => [ 2 ],
             'network-type_2|conn_type_1' => [ 3 ],
             'network-type_2|conn_type_2' => [ 4 ] ); 
print $hash{ "$network|$conn" }->[ $pos ];