Cloud Service Models

Question 1

Cloud Deployment Options

Answer 1

■ On-premise Solution
● Offers security but are costly and require a dedicated support team
● Confidentiality is better ensured, where physical and logical access can be controlled
■ Hosted Solution
● Third-party service providers provide hardware and facilities, often in a multi-tenancy environment, reducing costs and resource requirements
● Multi-tenancy solutions may expose residual data to other tenants as server capacity expands or contracts
● Understanding the hosting provider’s authentication, redundancy, fault tolerance, and data storage location is crucial

Question 2

Software as a Service (SaaS)

Answer 2

● Provider offers a complete solution, including hardware, software, and application access
● Examples
○ Office 365
○ Google Workspace
○ TurboTax
○ QuickBooks Online

Question 3

Platform as a Service (PaaS)

Answer 3

● Provider offers hardware and operating system software, allowing customization of applications
● Useful for developing web applications without managing underlying infrastructure
● Includes middleware and runtime

Question 4

Infrastructure as a Service (IaaS)

Answer 4

● Provides IT resources like servers, load balancers, and storage area network components
● Offers dynamic allocation of resources without long-term hardware commitments
● Focuses mostly on hardwares

Question 5

Exam Tip

Answer 5

■ If a service includes more than IaaS but less than SaaS, it’s likely PaaS