4.1 - Cloud Models

Question 1

Cloud computing

Answer 1

• More than just a server hosted elsewhere
  – Extend the management of applications and services
• Deploy an infrastructure in minutes
  – Create and tear down as you need
• International scope
  – Deploy in specific parts of the world
• Use only the required resources
  – Cost is based on the amount of use

Question 2

Cloud deployment models

Answer 2

• Private
  – Your own virtualized local data center
• Public
  – Available to everyone over the Internet
• Hybrid
  – A mix of public and private
• Community
  – Several organizations share the same resources

Question 3

Infrastructure as a service (IaaS)

Answer 3

• Sometimes called Hardware as a Service (HaaS)
  – Outsource your equipment
• You’re still responsible for the management
  – And for the security
• Your data is out there, but more within your control
  – Web server providers

Question 4

Software as a service (SaaS)

Answer 4

• On-demand software
  – No local installation
  – Why manage your own email distribution?
  Or payroll?
• Central management of data and applications
  – Your data is out there
• A complete application offering
  – No development work required
  – Google Mail, Microsoft 365

Question 5

Platform as a service (PaaS)

Answer 5

• No servers, no software, no maintenance team, no HVAC
  – Someone else handles the platform,
  you handle the development
• You don’t have direct control of the data,
  people, or infrastructure
  – Trained security professionals are watching
  – Choose carefully
• Put the building blocks together
  – Develop your app from what’s available on the platform

Question 6

IaaS / PaaS / SaaS comparison

Answer 6