Chapter 2 Digging Deeper into IaaS and PaaS In This Chapter I n this chapter, you look at Infrastructure as a Service  (IaaS) and Platform as a Service (PaaS) — two foundational  cloud delivery services. Both of these services provide flexibility that enables companies to respond faster to their  constituents’ needs. IaaS can serve two purposes: A service model can enable a company to efficiently and  effectively gain access to ongoing support as the business  changes. In addition, IaaS can allow the business to freely  experiment with new innovative software approaches without  impacting the budget. These materials are the copyright of John Wiley & Sons, Inc. and any  dissemination, distribution, or unauthorized use is strictly prohibited. ✓ IaaS can also be used effectively to augment data center  services, either to increase capacity when needed, to  replace aging hardware with cloud-based services, or to  provide ongoing access to sophisticated services, such  as advanced analytics. ✓ It can be a highly practical solution for companies that  want access to resources in an on-demand manner. ▶  Understanding IaaS ▶  Diving into PaaS ▶  Defining the requirements for IaaS and PaaS