| 4.1 Introduction to Network Security |
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| 4.1.1 Why is Network Security Important? |
| 4.1.2 Common Security Threats |
| 4.1.3 Types of Network Attacks |
| 4.1.4 General Mitigation Techniques |
| 4.1.5 The Network Security Wheel |
| 4.1.6 The Enterprise Security Policy |
| 4.2 Securing Cisco Routers |
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| 4.2.1 Router Security Issues |
| 4.2.2 Applying Cisco IOS Security Features to Routers |
| 4.2.3 Manage Router Security |
| 4.2.4 Securing Remote Adminitrative Access to Routers |
| 4.2.5 Logging Router Activity |
| 4.3 Secure Router Network Services |
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| 4.3.1 Vulnerable Router Network Services and Interfaces |
| 4.3.2 Securing Routing Protocols |
| 4.3.3 Locking Down Your Router with Cisco Auto Secure |
| 4.4 Using Cisco SDM |
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| 4.4.1 Cisco SDM Overview |
| 4.4.2 Configuring Your Router to Support Cisco SDM |
| 4.4.3 Starting Cisco SDM |
| 4.4.4 The Cisco SDM Interface |
| 4.4.5 Cisco SDm Wizards |
| 4.4.6 Locking Down a Router with Cisco SDM |
| 4.5 Secure Router Management |
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| 4.5.1 Maintaining Cisco IOS Software Images |
| 4.5.2 Managing Cisco IOS Images |
| 4.5.3 Managing Cisco IOS Images |
| 4.5.4 Backing up and Upgrading Software Image |
| 4.5.5 Recovering Sowtware Images |
| 4.5.6 Troubleshooting Cisco IOS Configurations |
| 4.5.7 Recovering a Lost Router Password |