Which of the following statements is correct about the firewall?

Q. Which of the following statements is correct about the firewall?

A.            It is a device installed at the boundary of a company to prevent unauthorized physical access.

B.            It is a device installed at the boundary of an incorporate to protect it against the unauthorized access.

C.            It is a kind of wall built to prevent files form damaging the corporate.

D.            None of the above.

Answer: It is a device installed at the boundary of an incorporate to protect it against the unauthorized access.