Certified Network Defender (CND) — Question 12

John wants to implement a firewall service that works at the session layer of the OSI model. The firewall must also have the ability to hide the private network information. Which type of firewall service is John thinking of implementing?

Answer options

Correct answer: B

Explanation

The correct answer is B, Circuit level gateway, because it operates at the session layer and can hide private network information by establishing a session before any packets are transmitted. The other options do not meet both criteria: A (Packet Filtering) operates at the network layer, C (Application level gateway) works at the application layer, and D (Stateful Multilayer Inspection) functions at the transport layer.