Answer:
Firewalls
Explanation:
A firewall is simply a network security system whose main duty is. to prevent unwanted access to. private network.
Firewalls is measures to protect your computer against threats from human actions.
It is also the one singular thing that prevents you from accessing the file on your friends system.
My opinion is the answers A and D. I would choose A if you can only choose one, though.
Answer:most of the computer campanies use java script, phyton, c++ or c sharp .
Explanation:
