Which of the following is an effective method for controlling downloading of files via FTP? Choose
the BEST answer.
A.
An application-layer gateway, or proxy firewall, but not stateful inspection firewalls
B.
An application-layer gateway, or proxy firewall
C.
A circuit-level gateway
D.
A first-generation packet-filtering firewall
Explanation:
Application-layer gateways, or proxy firewalls, are an effective method for controlling
downloading of files via FTP. Because FTP is an OSI application-layer protocol, the most effective
firewall needs to be capable of inspecting through the application layer.