Nucleus, is there a better alternative?

Fiber optic internet service like fios  only fiber to the pole then regular copper cable to the house 

little green computer sell Ethernet to fiber converters 

I use the uptone ether regen that has a fiber optic input ,there multi regulators 

regen all noise ,buy one at the router and other end , most expensive is at the dac side it has a Ethernet to USB if running a external dac ,imo  a top notch dac has much better isolation and LPS , especially Multibit R2R dacs .

Same here, my fiber optic line runs from pole, through wall to an optical box in the house, then ethernet to a router and coax to a few extenders (simply because the coax runs were already here when i move in) but the extenders are pretty crap.

Sonore OpticalRendu and OpticalModule no longer available, They are having to be redesigned due to chip shortages, I have OpticalModule on order for perhaps two month, who knows how much longer wait.

@emergingsoul  FMC does BLOCK noise at point where optical cable comes out of first FMC. it does not ELIMINATE noise created at any point prior to that. The entire streaming chain still subject to signal loss due to noise, same as with ethernet. Theoretical advantage of optical wholly based on proposition it totally blocks noise vs. ethernet which may continue to pass along noise produced upstream. Ethernet filters reportedly effective in blocking this noise. I will soon be comparing Acoustic Network Muon to FMC prior to server.

Network switches seem to be a great source for creating lots of noise. So do the network switches limit the noise being created?

A network switch is like an orgy of traffic because of all the Sharing of netwerk that goes on