What is a Next Generation Firewall (NextGen or NGFW)? 12. What is the primary value of a firewall? 13. What is Port Address Translation (PAT) and how does it work? 14. How do screened host architectures for firewalls differ from screened subnet firewall architectures? Which offers more security for the information assets that remain on the trusted network? 15. What is a sacrificial host? What is a bastion host? 16. What is a DMZ? Is this really an appropriate name for the technology, considering the function this type of subnet performs? 17. What questions must be addressed when selecting a firewall for a specific organization? 18. What is RADIUS? What advantage does it have over TACACS? 19. What is a content filter? Where is it placed in the network to gain the best result for the organization? 20. What is a VPN? Why is it becoming more widely used?