Firewall Architecture Discussion

There are several different firewall architectures available:
Main Border Firewall
Screened Firewall
Internal Firewall
Host Firewall
DMZ Firewall

In this discussion, you are to describe each of these and describe when they could/would be used. Additionally, how can these be layered and used together to provide better security? What could be a disadvantage to using any of these firewalls?

Firewall Architecture Discussion