Network Switches

You could try StackAudios Smooth LAN Regenerator. 

These modified switches not worthwhile, get all switch mode power supplies out of streaming chain, better cables, network filters, etc, all are better investments.

If you're worried about "ground plane noise" or other such nonsense made up by people determined to imbue digital audio with analog traits just because they understand analog on account of having been doing it for 70 years, whereas digital frightens and confuses them, the solution is simple and inexpensive. 

Use SFP for the last run into your streamer. Voilà! Problem solved.

+1 on the iFi

Additionally, if a guy is stuck deep in the weeds/chasing some noise through the ethernet infrastructure... but, if the speaker is some lackluster li’l matchbox and the room is low resolution chaos, all this ’ethernet stuff’ (for instance) wouldn’t matter a whole lot.

[probably 90+ % of tweakers swimming in the neurotic ocean]

You can also pick up an iFi LAN iSilencer on amazon and combine it with a better cable. I wouldn’t waste money on a $500 switch. 

I have 3 switches ranging from $45 to $450. The $450 is today’s price, I paid MSRP of $150 before it became very popular. 

All my switches support fibre optic output. They take RJ45 Ethernet input from my router, I take the bits from the SFP output of the switch into a Sonore OpticalRendu streamer (I have 3 of these). The Rendu then converts to USB and into my DAC. The last part is where the purity of the solution breaks a bit, but it is not the end of the world. Ideally, a Lumin U2 streamer or X1 DAC/Streamer takes the fibre connection direct into the SFP on the U2 or X1 (owned this before).

Bits are just bits is not what this solution is concerned with. It is the analog noise on the wire that someone posted about earlier in the thread. Fibre optic is made of glass and CANNOT carry this analog noise into the DAC.

Saying all of this, I could not tell a sonic difference between my 3 network switches. Most likely because I am using fibre optic and the analog noise of my cheap ROON core computer and other network gremlins cannot get into my DACs because of the fibre moat.