Q402. Which among the following is correct:

Вариант ответа 1 - a) A firewall is a system designed to prevent unauthorized access to or from a private network.

Вариант ответа 2 - b) Firewalls can be implemented in both hardware and software or a combination of both.

Вариант ответа 3 - c) Both of Above

Вариант ответа 4 - d) None of these