CompTIA A+ 220-1201 (4.2 - Cloud Models)

Cloud computing

• More than just a server hosted elsewhere

- Extend the management of applications and services

• Effectively unlimited resources

- You just have to pay for it

• 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

Cloud deployment models

• Private - Your own virtualized local data center

• Public - Available to everyone over the Internet

• Hybrid - A mix of public and private

• Community - Organizations share the same resources

Infrastructure as a service (IaaS)

• 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

Software as a service (SaaS)

• 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

Platform as a service (PaaS)

• 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

- SalesForce.com