Antenna for adsl splitter?

Question

Computer networks

The school has wired internet, there is an adsl splitter on the walls Is
there an antenna that can be plugged into the connector for the internet cable and then a cable into it

Answer 1

There are no such antennas.
Perhaps he meant an ADSL modem with wi-fi.

Answer 2

Certainly!
Take a phone wire from any phone with the right connectors, just cut it in half.
You stick one part into the splitter and the other into the ADSL modem. The range is no more than 10-15 meters.

Answer 3

there is an adsl splinter on the walls

Do I have one on Splinter on the wall?