Comparison should include

• cloud models
• Infrastructure as a service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS)
• externally shared resources.

Process/Skill Questions: 

• What are public, private, and hybrid clouds?  
• What security concerns should be considered when IoT devices use cloud services?
• What current cloud services are available?
• What are examples of IaaS, PaaS, and SaaS providers?