CompTIA Network+ Study Guide

Chapter 3. Cloud Computing

A Note for Early Release Readers

With Early Release ebooks, you get books in their earliest form—the author’s raw and unedited content as they write—so you can take advantage of these technologies long before the official release of these titles.

This will be the third chapter of the final book.

If you’d like to be actively involved in reviewing and commenting on this draft, please reach out to the editor at [e-mail].

In this chapter, you will learn how to: 

• Describe cloud deployment models 

• Explain service models used in cloud computing

• Describe specific public security deployment and connectivity options 

The move into cloud computing began with the development of virtualization technologies on the desktop. The shift in thinking about each computing device performing a dedicated function to thinking about “computing” as simply “processing power” anywhere on generic hardware was the paradigm shift.

A “network” in ancient terms consisted of computing devices that connected together via a switch at the local level and a router between networks, just like Chapter 1, “How Networks Work,” described.

Each computing device did stuff. Workstations ran operating systems and applications, with which people could create cool things. Personal computers loaded operating systems and applications into active memory—RAM—from storage—hard drives (HDDs)—and used the central processing unit (CPU) to process what the user did with the application.