You can also drill two holes in the floor and run the cable through the basement.
Inexpensive way to run ethernet to basement from second floor.
When running ethernet cable its always best practice to run more cable length than is needed in case something is done wrong on the termination side.
Best way to run cable from basement to second floor need to run some cables coax power cat6 from the basement to the second floor attic bungalow in 3 different places.
Might take some work to get up there.
The bigger the hole the better.
The really really cheapest way is to run your ethernet cable along the floor and through the doorways.
The two wiring standards for ethernet cable termination are t568a and t568b.
Mount a low voltage plate to the wall and then fish the fire up to it finish it with a wall plate.
Then drill up from the basement into that same wall cavity and use fish tape to get all the way up.
Find a good place to run the wire from the basement to the attic.
One will run next to a heat duct that goes up to the second floor.
What i personally have done is just run the wire myself but it s a lot of work.
On an interior wall you can cut the opening for the wall plate on the 2nd floor then use a flex bit to drill down into the cavity of the wall on the first floor.
Other places i had to drill.
According to t568b which is the one.
Wherever you want to put the outlet drill a small hole.
The ethernet cable will pass through the top floor into the basement at the closest point to the location of the device on the lower level.
Running through interior closet walls for all three.
Getting through the wood at the base of the second floor isn t as hard as getting through the fire blocking horizontal 2x4s in the stud cavity.
The second cheapest way is to drill a hole in the floor of each room near a convenient wall and pull a cable through basement or crawl space.
Spot an access point in the middle of the floors.
Use the coat hanger to see if everything is fine at this location and there are no obstructions.
But can be done.
Punch a hole from the basement assuming you have one into the wall where the router is.