The following questions are designed to test your knowledge of network security deployment options and best deployment practices, and they sometimes build on knowledge found elsewhere in the book. You might find that each question has more than one possible answer. The answers provided in Appendix B are intended to reinforce concepts that you can apply in your own networking environment.
Assume you are adding a NIDS to a three-interface firewall design. If you have budget for only one sensor, where should it go?
Assume the same design as the previous question, but now you have budget for two NIDS sensors. Where do you put them?
Your boss has asked you to select a device to provide connectivity to 50 branch offices. Each branch office requires VPN connectivity, routing, firewalling, and an IDS. Budget and manageability are key concerns. Which device, or devices, should you recommend?
Which future technology might make using NIDS to stop attacks more viable?
When might you want to have more than one public services segment on your Internet edge?
What is the most important component of any security technology deployed on an open source, noncommercially supported platform?
Part I. Network Security Foundations
Network Security Axioms
Security Policy and Operations Life Cycle
Secure Networking Threats
Network Security Technologies
Part II. Designing Secure Networks
General Design Considerations
Network Security Platform Options and Best Deployment Practices
Common Application Design Considerations
Identity Design Considerations
IPsec VPN Design Considerations
Supporting-Technology Design Considerations
Designing Your Security System
Part III. Secure Network Designs
Edge Security Design
Campus Security Design
Teleworker Security Design
Part IV. Network Management, Case Studies, and Conclusions
Secure Network Management and Network Security Management
Appendix A. Glossary of Terms
Appendix B. Answers to Applied Knowledge Questions
Appendix C. Sample Security Policies
INFOSEC Acceptable Use Policy
Guidelines on Antivirus Process