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CCNA Security exam topics covered in this part:
• Describe the different methods used in cryptography
• Describe VPN technologies
• Describe the building blocks of IPsec
• Implement an IOS IPsec site-to-site VPN with pre-shared key authentication
• Verify VPN operations
• Implement Secure Sockets Layer (SSL) VPN using ASA Device Manager
Chapter 17: Fundamentals of VPN Technology
Chapter 18: Fundamentals of the Public Key Infrastructure
Chapter 19: Fundamentals of IP Security
Chapter 20: Implementing IPsec Site-to-Site VPNs