Here is my current state:
I am using my own Netgear router with FIOS. It is in my second floor and connected to a wall outlet using an ethernet cable. My first floor has the ONT box. My third floor receives weak signal which is why I would like to set up a second router (an old Belkin) on my third floor. My third floor also has a wall socket saying “Data”. Is it possible to connect my second router on the third floor to FIOS? If yes, could anyone please provide step-by-step details?