Cat hole cable run...
In order to gather consistent results while performing speed tests this afternoon, I needed a 1Gb/s link upstairs. Wireless would not do for these tests.
Luckily there is a cat hole in the wall:
Down the basement stairs:
Hanging in the air to the router in the rack. Don’t worry, I tied the cable in a knot around the rack. This way if someone tripped over the wire while walking down the stairs it won’t knock the router off the top shelf: