I have duplex that I just purchased and I am going to supply internet to each apartment. There will be a common internet used for the whole building which will be used for doorbell and security cameras.
I also want each apartment to have it's own separate internet(each room has hard wired Ethernet outlets) and Wi-Fi connections, but I do not want Apt 1 and Apt 2 to have any access to each others network by default (unless neighbours share Wi-Fi passwords).
Is this possible? If so, what would be a good way to accomplish this? I have attached a diagram to illustrate. thank you for any assistance