CCSP Self-Study: Cisco Secure Intrusion Detection System (CSIDS)

Appendix B. Answers to Chapter Review Questions

Chapter 1

1:	What are the four types of network security threats?
A1:	Answer: The four types of network security threats are unstructured threats, structured threats, external threats, and internal threats.
2:	What are the three main attack types?
A2:	Answer: The three main attack types are reconnaissance, access, and denial-of-service.
3:	What is the first line of defense against external attacks?
A3:	Answer: The perimeter defenses on your network provide the first line of defense against external attacks.
4:	Why is network security needed?
A4:	Answer: The global connectivity of the Internet has enabled hackers to attack your network from anywhere in the world.
5:	Attacks against network resources fall into ...