I needed to add a Laserjet 4100 using ethernet so I bought a WiFi Extender. Router is on 2nd floor, Extender on 1st floor. Ethernet runs from the Extender to the printer.
That's the A Ticket. It's wireless and solves the problem. Way too much brain damage with most of the suggestions in this article.
We have a two story house with the router in the basement. Installed an extender on the main floor. Problem solved. My signal at home is stronger than my signal at work.