Chapter 2

Infrastructure Security and Segmentation

Chapter 1, “Let’s Talk About Network Security,” discusses the importance of identifying and securing the assets in your network. One of the most important assets is the network itself. If your network devices are compromised, then any data flowing through it will be compromised, too. This chapter discusses the security of the network infrastructure, including the three planes: management, control, and data.

This chapter also discusses the importance of segmenting traffic within a network as well as methods for doing so. Finally, this chapter lays a foundation for traffic analysis and security integration with a discussion on NetFlow and its security benefits.

The Three Planes

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