I have a VLAN set up on my network. The music network only needs two active ports, for my network music storage drive and my streamer. The streamer is connected via a fibre optic port (the two separate ones on the right).
What it does is stop traffic unrelated to audio bouncing down the audio ports. It costs $100 because you need a small controller box.
I'm not using it at the moment because I need to use Roon on both networks and I've not yet asked how to set up a shared port for the Roon Server (which I assume is possible).
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