Question

How One Can Prevent An Outsider From Hacking Your Wi-fi ?

Answer 1

The easiest way to defend your wifi is to change your network name from the default and to also change your passord. Choose a strong password that contains numbers and a capital letter. Hope this helps

Answer 2

The best way to prevent hackers is to create a complex password combination of numbers and letters with some caps lock capital.  Hope this helps.