TCP/IP affects every networked application and endpoint on the internet.
BGP runs the internet routing "in the background" and you only need to know it if you're an internet service provider or work in a large org managing the network. If you didn't learn network routing, you aren't going to learn BGP.
Put two or three VMs (OpenBSD has OpenBGPD daemon) onto a shared virtual switch and addresses in 172.31.255.0/24, connect the VMs. Also each of the VMs should have at least one other interface onto unique virtual switches with their own network (172.31.1.0/24, 172.31.2.0/24, etc).
BGP runs the internet routing "in the background" and you only need to know it if you're an internet service provider or work in a large org managing the network. If you didn't learn network routing, you aren't going to learn BGP.
Put two or three VMs (OpenBSD has OpenBGPD daemon) onto a shared virtual switch and addresses in 172.31.255.0/24, connect the VMs. Also each of the VMs should have at least one other interface onto unique virtual switches with their own network (172.31.1.0/24, 172.31.2.0/24, etc).
Then set up BGP to redistribute connected routes.