In large corporate networks having supply partners across the globe, network traffic may continue to
rise. The infrastructure components in such environments should be scalable. Which of the following
firewall architectures limits future scalability?

A.
Appliances

B.
Operating system-based

C.
Host-based

D.
Demilitarized

Explanation:
The software for appliances is embedded into chips. Firmware-based firewall products cannot be
moved to higher capacity servers. Firewall software that sits on an operating system can always be
scalable due to its ability to enhance the power of servers. Host-based firewalls operate on top of
the server operating system and are scalable. A demilitarized zone is a model of firewall
implementation and is not a firewall architecture.