Router configuration inside subnet

192.168.1.1 to configure router, for example:
WPA2 encryption, MAC address filtering, guest network, port forwarding, restrict internet access such as only Monday allow to access, block centain website, filter some keywords.

Both the Windows and Mac computers can take  an Internet connection through their Ethernet ports, and then creating a Wi-Fi network that your other devices can connect to.

But when you put the wireless router in the another subnet with 191.168.*.*, you may need to change the wirelss router IP to, such as 192.168.10.1 to avoid the overlap with original router 192.168.1.1.
And you restart the wireless router after you change its IP.