I have a two story house. The router is on second floor, the cable modem is on main floor. Both of these were provided by Spectrum. The internet Ethernet connection from the cable modem goes to a switch first, then multiple ethernet cables flow to various rooms from the switch. Now I want to setup a second wifi network on the main floor since the signal is not very good and I have many devices like Firesticks, TV, and phones connected on main floor. The reason the main router is on the 2nd floor is I need dedicated LAN access to two computers that are used for working from home office. So in essence I want to create a second network using the internet Ethernet cable outlet I have on the main floor. But I don't want the 2.4 GHz and 5 Ghz signals to interfere as well as I think IP of 2nd router will need to change. I don't want to setup a wifi repeater or extender, rather a separate network. Is this possible?