Ehernet cable question in streaming systems

The point @sailboat is making that data is only being supplied to the processing component.
Good cable runs are helpful, an example would be Shielded Cable.

And that's why Supra CAT8 is being recommended. Separate shielding on each conductor.
Yes, it's data being transmitted.

sailboat"sigh..... shame so many folks don't understand how digital music actually works."
Since you see to be a knowledgeable expert, authority, and possibly even another Audiogon visionary why don't you tell us how it works because as you might imagine some of us could be confused does digital use 1's and 0's or is it just an on and an off I have always wondered that myself and is it really perfect forever because forever is a long time!

In a home network you won't see any improvement between 6a,7 or 8 but monoprice has good product and is reasonable so buy whichever you're  comfortable with. . These all use shielding. 

You need to choose wisely...
Monoprice CAT6 is unshielded. This is what I was using before CAT8.

https://www.monoprice.com/product?p_id=18600

https://www.monoprice.com/product?p_id=7499

Digital music? It is a transport of tiny analog square waves that receivers interpret as 0 and 1. Good cable practicing also apply here. Noise and leakage currents can travel on the line. Some cables preserve the bitstream better on the way to the endpoint and the receiver/converter has better info to work with. Cabling is always the icing on the cake in audio.

I think the Supra is better then the Audioquest Cinnamon. I have had both. Supra can sound a bit darker, but it is the absence of noise (due to the pitch twist and the shielding). They also interfere less with other cables.