What is displayed in the figure above?
A) OSPF border areas
B) Using NAT on a small office network
C) Proxy firewall as an application-level gateway
D) Firewall proxy as a circuit-level gateway

Question

What is displayed in the figure above?
A) OSPF border areas 
B) Using NAT on a small office network 
C) Proxy firewall as an application-level gateway 
D) Firewall proxy as a circuit-level gateway

Quizplus · Accepted Answer

The figure shows a firewall proxy as a circuit-level gateway, which is used to control access to a network by examining each incoming and outgoing packet, making decisions based on the packet's source and destination addresses, and blocking packets that do not meet the specified criteria. The other options (OSPF border areas and NAT on a small office network) are not related to the figure. Although a proxy firewall can also act as an application-level gateway, the figure explicitly shows a circuit-level gateway configuration.

What Is Displayed in the Figure Above