To achieve the network setup you described, where Group A can connect to both Group B and Group C, but Group B cannot connect to Group A and Group C, and Group C cannot connect to Group A and Group B, you can configure this using IP address settings and potentially firewall rules. Here's a general guide on how you can set up the IP addresses for each group on Windows 7: 1. Assign IP Addresses: - Group A: - Set a specific IP address range for Group A, for example: - IP Address: 192.168.1.X (X is a unique number within the range) - Subnet Mask: 255.255.255.0 - Group B: - Assign a different IP address range for Group B: - IP Address: 192.168.2.X - Subnet Mask: 255.255.255.0 - Group C: - Assign another IP address...