I just got a Zyxel Modem from Century Link and 5 usable Static IPs in a block of 8. I configured the modem for "transparent bridging" and configured the PPOE credentials on a DD-WRT router and now ...

What you see in that sample file is all you need to configure that static IP address. Do notice, you aren’t setting the address is the same fashion as you did with Ubuntu 16.04.

How to Configure a D-Link Switch for a Static IP Address. When a network router doesn't have enough network ports to connect all the necessary devices, a switch can be used to add additional ports.

Learn how to assign a static IP address to a Windows 11/10 computer, using Network Settings, PowerShell, CMD or Windows Settings.