Get rid of the bondage of thread. You don't need wiring, you can place your computer at will. Use unrestricted routing. You can add unlimited clients. Not limited by ports.

Bad place.

Can't penetrate the reinforced concrete wall. Every time it penetrates, the signal will generally weaken.

About upstairs, ub is relatively stable and easy to drop. It can be solved by purchasing different brands of wireless network cards.

The performance of D-link wireless network cards on the market is relatively poor.

There are also cheap fast wireless network cards. There will be problems of instability and easy disconnection.

If the transmission distance is long, a signal amplifier can be added. So as to improve that quality of wireless network.