Cisco also offers the integrated security solution, which delivers services above and beyond the "one size fits all"
model. In addition, Cisco services are designed to deliver value throughout the entire network life cycle that
includes the stages of prepare, plan, design, implement, operate, and optimize (PPDIOO). the Cisco PPDIOO
model, as shown in Figure 1-1, encompasses all the steps from network vision to optimization, enabling Cisco to
provide a broader portfolio of support and end-to-end solutions to its customers.
Figure 1-1. The Cisco PPDIOO Model
Part I: Perimeter Security
Chapter 1: Overview of Network Security
Chapter 2: Access Control
Chapter 3: Device Security
Chapter 4: Security Features on Switches
Chapter 5: Cisco IOS Firewall
Chapter 6: Cisco Firewalls: Appliance and Module
Chapter 7: Attach Vectors and Mitigation Techniques
Chapter 1. Overview of Network Security
At the same time networks are growing exponentially, they are becoming complex and mission critical, bringing
new challenges to those who run and manage them. The need for integrated network infrastructure comprising
voice, video, and data (all-in-one) services is evident, but these rapidly growing technologies introduce fresh
security concerns.
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