2 network cards one computer
2 Routers, 2 LAN cards LAN card 1 (Built-in) - Cable Modem > Router 1 > LAN 1 * Router 1 - this is for my PC's internet access and my other devices. LAN card 2 (PCI-e card) - Router 2 > LAN 2 * Router 2 - there are 2 other PCs connected. This network is for work only and file sharing, no internet access allowed.