AP points, Mesh nodes or "extenders" with ethernet backhaul or power line are better if set up properly (mesh units will do this for you), otherwise manually you want to set the extenders or second AP ...
Until recently, there wasn't much you could do to remedy the situation short of hardwiring your house -- and if you live in a rented apartment, or if you don't want to start drilling holes in your ...
For those who can't run Ethernet cable through their home or where obstacles like thicker walls make mesh networking less viable, powerline adapters have been a handy solution to provide networking ...