I'd like to build a small LAN network with two PCs, a NAS and a server for demo app deployment. Based on the vague idea I have, it should minimally look like this:

Diagram of what I am trying to build

(the arrows represent Ethernet cables) The problem is: I'd like to connect both of my PCs to:

• (a) the internet
• (b) my NAS
• (c) my server

However, the Mac mini has only 1x port, so I need something between the cables and the machine. I could install other Ethernet ports on the Workstation, but it depends what the other option is.

Thank you in advance!!