I would keep the ‘No name’ 30FT CAT8 LAN cable from router as is and insert ENO filter ahead of N200. ENO comes with no questions asked 30days return policy.
The other ways to improve N200 performance is by using a high quality OCC power cable and grounding the Earth/Ground Terminal.
And lastly, try different USB cable between N200 and DAC for the nth degree of improvements. The ENO USB III or Kimber KSUSB-HB are the finest USB cables I’ve tried in my system that are truly exemplary. I recommend making these changes incrementally so you can properly access the effectiveness of each upgrade.
If you haven’t picked up yet, I subscribe to ‘everything matters’ philosophy. My ‘Digital’ system is listed here for your reference.

