What type of firewall requires individual client applications to be authorized to connect?
A. Screened gateway
B. Stateful packet inspection
C. Dual-homed
D. Application gateway
An Application Gateway (Option D) is the type of firewall that requires individual client applications to be authorized to connect.
Explanation:
The type of firewall that requires individual client applications to be authorized to connect is an Application gateway (Option D). This type of firewall operates at the application layer of the OSI model and is capable of inspecting entire network traffic.
An application gateway firewall scrutinizes network packets up to the application level, unlike other types of firewalls. It is also considered one of the most secure types of firewalls as it can block traffic based on application-specific commands and can even monitor encrypted traffic, providing a deep level of security.
Conclusion:
Although an Application Gateway firewall requires more resource-intensive scrutiny of individual network packets, it offers a high level of security and control.