Certified Ethical Hacker – CEH – 312-50 – Question353

Which of the following types of firewalls ensures that the packets are part of the established session?


A. Stateful inspection firewall
B. Circuit-level firewall
C. Application-level firewall
D. Switch-level firewall

Correct Answer: A

Explanation:

A stateful firewall is a network firewall that tracks the operating state and characteristics of network connections traversing it. The firewall is configured to distinguish legitimate packets for different types of connections. Only packets matching a known active connection (session) are allowed to pass the firewall.

References: https://en.wikipedia.org/wiki/Stateful_firewall