Hi Rene,
Thanks for this tutorial but i think you should have discussed about types of firewall ?
As per my point of view the stuff of R&S ( CCNA to CCIE ) you created and sharing globally that’s great which help me a lot and and i think others as well so I want to give my view that you must add Security part ( CCNA to CCIE) written and Lab both in your curriculam.
BTW thanks a lot again you and Laz too for creating this channel and well support for clearing doubts.