Certified Ethical Hacker (CEH) — Question 104

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

Answer options

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

Correct answer: A

Explanation

A stateful inspection firewall tracks the state of active connections and ensures that packets are part of a valid session. In contrast, a circuit-level firewall operates at the session layer but does not inspect the state of packets, while an application-level firewall works at a higher layer and focuses on specific applications. A switch-level firewall is not a standard term in firewall technology.