Our organization's SharePoint Farm was supposed to be a 3 tier architecture but somehow the web server is idle and application server is working as both, web server and application server. Our vendor is about to make a change in Farm to really make it a 3 tier farm.
Now they have advised to switch DNS to point to IP of web front-end server, also they would deploy deployment packages to this idle web server. Please make a note that SharePoint 2010 is running on this web server already, the only issue is that the web server is not separate currently and in some days it would be a separate machine/server.
Is this a right methodology? Will this boost performance of the SharePoint Farm? What good changes it will bring after executing these steps on web front-end server?