CHAPTER 22
Virtualization
In this chapter, you will learn how to
• Explain why virtualization is so highly adopted
• Describe the service layers and architectures, and characteristics of cloud computing
The subject of this chapter, virtualization, can be a little slippery and hard to understand. A big reason is that virtualization isn’t one concrete thing you can grab with your hands. There are many kinds of virtualization, and the thread tying them together isn’t very obvious—it’s just an idea.
The important idea at the heart of every kind of virtualization is to take an existing component (anything in or attached to the system) and make it more flexible by replacing it with a layer of software that (as far as anything interacting with ...
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