The Cloud deployment models section answered the question where are we going to deploy our resources? In this section, we'll address the question what type of resources are we going to use? 

Cloud computing services generally come in four forms:

• Infrastructure as a Service (Iaas)
• Platform as a Service (PaaS)
• Software as a Service (SaaS)
• Serverless

Your computing needs will drive what type of services you choose. Frequently, solutions can be built from any or all three types of services. It's important to identify what parts the organization wants to own or manage, what type of development the organization wants to do, and where the different points of responsibility will be.

This section will help you understand the types of services available. Knowing the capabilities and of each will help you choose what is right for your business needs.