Full page load - with NodeJS templates

Hey all,

So my understanding when using the template function of NodeJS, is that for example if I have a layout page, with a top nav menu on every page, and then different content on each view - that when I move between pages, it would only loa the content page, and not a complete page load (normal server side render action).

Do I simply misunderstand how NodeJS works, and even with the templating - it will still load the entire page each time?