Can I Use an Ethernet Outlet for WiFi in My Rented Basement?

There are a few factors to consider. First, do you have admin access to the router upstairs? Also, does the room itself have an Ethernet port, and is the WiFi setup up there connected to it? Knowing that will help clarify your options.

Just a heads-up, WiFi is a wireless connection, so you won't be directly connecting to it through the Ethernet outlet unless there's a proper connection to your router. You need to trace where that outlet leads and make sure it’s wired into your router. Also, be careful, as a phone jack can look similar to an Ethernet jack if you're not familiar with them.

It really depends on where that Ethernet line leads to. It might not be connected to anything on the other end, or it could be wired to something else, like a phone line. The best way to find out is to plug your laptop in and see if it works.

If you're trying to connect to the router upstairs, the first thing you should do is check the router's control panel while you're on the WiFi. Look for the documentation to find the correct address to access it in your browser. If you can connect via that Ethernet port and access the control panel again, then you're on the same network; if not, then you're probably not connected.