This chapter covers the following subjects:
The Cisco IOS Firewall is a group of features that makes Cisco IOS Software more effective for perimeter security. The firewall features are based on inspection of data in IP packets, including data beyond the headers.
The perimeter router running the Cisco IOS Software security feature is referred to as Cisco IOS Firewall in this chapter.
The purpose of the “Do I Know This Already?” quiz is to help you decide whether you really need to read the entire chapter. If you already intend to read the entire chapter, you do not necessarily need to answer these ...