Summary Azure Fundamentals AZ-900

The Cloud Defined
Saturday 25 June 2022 13:20



Characteristics Cloud Computing Benefits
1. Resource pooling
2. Rapid elasticity 1. No up-front capital expenditure
3. Metered usage
4. Broad access 2. Cloud provider security accreditations
5. Self-provisioning
3. Quick IT solution deployment

4. Underlying technical complexities are hidden

5. Less on-premises space, power, HVAC

Cloud Computing Considerations

1. Cloud services that meet business needs

2. On-premises system/data cloud migration

3. Technical expertise of IT staff

4. Total cost of ownership (TCO)

5. Data privacy laws/regulations




Cloud Computing Page 1

,Virtualisation and the Cloud
Saturday 25 June 2022 13:29



- Cloud computing depends on virtualisation
- The use of virtualisation does not unto itself imply cloud computing

Hypervisors
- Physical servers that host virtual machines ("guests")

Type 1 - Bare-metal
Type 2 - Runs within a standard OS

Virtualisation Types

- Operating system

- Application (predates containerisation and containers like docker)

- Networking
Software Defined Networking (SDN)

- Desktop

Virtualisation Benefits
- Cloud tenant isolation
- Rapid provisioning of VMs
- Easy provisioning of VMs




Cloud Computing Page 2

,Cloud Computing and Economies of Scale
Saturday 25 June 2022 13:38


Resource pooling

- Storage
- Hypervisors
- Routers
- Switches
- Inter-data centre network links




Other Considerations
- On-prem: capital expenditure (Capex)
- Cloud: operating expenditure (Opex)




Cloud Computing Page 3

, Public Clouds
Saturday 25 June 2022 13:41



- Broad access
- Resource pooling
- Rapid elasticity
- Self-provisioning
- Metered usage

- Cloud resource management
○ Web browser
○ Other GUI tools (storage explorer tool)
○ Command line tools
○ APIs
- Split IT responsibility depending on cloud services used
- Cloud service offerings may vary from between geographical regions





Cloud Computing Page 4