The following questions are designed to test your knowledge of network security technologies and sometimes build on knowledge found elsewhere in the book. You might find that a 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.
In this chapter, questions 1 to 5 relate to concepts you read about. Question 6 is offered as an exercise for you to apply in your own organization; there is no one correct answer for this question.
In Table 4-9, file system checking is listed as detecting both web application and buffer overflow attacks (the two elements of the application manipulation subclass). How does it do this?
If you usually use OTP through TACACS+ when authenticating administrators to network devices, how would you deal with an automated script that checks configurations or upgraded software images?
When might SSL be used instead of IPsec for a VPN deployment?
If you don't need the level of user control that proxy servers offer for all your users, what kinds of users still might benefit from the technology?
Besides running AV software, what else is equally important in stopping the spread of viruses?
Find at least three places in this chapter where you disagree with the rating values I've assigned to security technology. Consider building the included tables yourself and assigning your own values. Did the overall score of any technology significantly change? Did the top technology in any category change?
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