Laravel Routing- Multiple Route

I'm using laravel to make an API. The following endpoints will be available:

Currently I have:

Route::get('/{appname}/{network}/{device}', function()
{
    return 'Hello World';
});

This services /appname/network/device/ but what I would like is so it can be the following but in one route without the need for additional routing:

Route::get('/{appname}', function()
{
    return 'App Name';
});

Route::get('/{appname}/{network}', function()
{
    return 'App Name / Network';
});

Route::get('/{appname}/{network}/{device}', function()
{
    return 'App Name / Network / Device';
});

I understand that I could use RESTFUL controllers but this would only work (I believe) with names like:

public function getAppname()
{
    //app
}

But if I used:

public function getAppnameNetwork()
    {
        //app-network
    }

it would become:

/appname-network/

Any advice/help would be greatly appreciated.

Thanks :)