u/Mr-potatos-mash

I just moved into an older house built in the 80s. The previous owner had Fios install the ONT in a corner of the basement. I would like to set up a network closet 2 floors up (top floor) so that I can add a switch and run ethernet from the attic to POE security cameras. It would be very difficult to run an ethernet cable from the existing ONT to the location of the potential network closet. As a novice to home networks, I'd like to seek advice on the best way to handle this diy project. TIA