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CHAPTER 1 The Evolution of the Data Center 3 These materials are © 2020 John Wiley & Sons, Inc. Any dissemination, distribution, or unauthorized use is strictly prohibited. Chapter 1 IN THIS CHAPTER » Looking at enterprise cloud adoption » Understanding hybrid cloud and data center security challenges » Recognizing the limitations of legacy security infrastructure » Taking a new approach to security in the hybrid cloud The Evolution of the Data Center T his chapter explores how public and private cloud adoption have led to a hybrid cloud environment in the enterprise, the unique security challenges and limitations of legacy security, and how to address security in the data center and hybrid cloud. Understanding the Impact of the Cloud on the Data Center We live in an age of cloud and digital transformation. Users and applications are moving outside the traditional network perimeter, accessing an ever-increasing number of applications — including software-as-a-service (SaaS), platform-as-a-service (PaaS), and infrastructure-as-a-service (IaaS) application workloads in the public cloud. Organizations face the challenge of proactively pro- tecting their users, applications, and data from security threats without compromising user experience.