Connect the PC with two network cards to the other two PCs. Assign following IP Addresses to PCs:
[PC C] – Card 1 – Card 1 – [PC A] – Card 2 – Card 1 – [PC B]
PC C Card 1 – 192.168.1.2 Mask 255.255.255.0 Default Gateway – 192.168.1.1
PC A Card 1 – 192.168.1.1 Mask 255.255.255.0 Default Gateway – 192.168.1.1
PC A Card 2 – 192.168.2.1 Mask 255.255.255.0 Default Gateway – 192.168.2.1
PC B Card 1 – 192.168.2.2 Mask 255.255.255.0 Default Gateway – 192.168.2.1
Once this configuration is done, you will need to enable IP forwarding on PC A. After doing this, PC B and PC C will be able to talk to each other, as well as to PC A
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