Multiple choice

Which of the following functions cannot be accomplished by the fourth-generation firewalls?

Fourth generation firewalls operate upto layer 4 (transport layer) of the OSI model.

  1. Block ICMP packets

  2. Understand FTP

  3. Block incoming traffic from a specific user on a single user system

  4. Block outgoing traffic to a specific IP address on a single user system

  5. Block TCP traffic from a specific user on a multi-user system

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A fourth generation firewall cannot understand FTP as FTP operates in application layer, which resides higher than transport layer. A fourth-generation firewall can understand protocols upto layer 4 only.