Does a access point ( old router) need to be hardwired ( Ethernet cable) to my main Modem/Router? When there is talk of wirelessly connecting this, I don't understand. Wouldn't that be a lower WiFi ou

I currently have a RE220 extender, that I have attached to a home surveillance system, that has a NVR with it's own WiFi. . I also have a few Roko video systems that run off of my home WiFi network. I