Describe Cloud Concepts

Question 1

What is CapEx

Answer 1

Purchasing an asset upfront (typically on premises)

Question 2

What is OpEx

Answer 2

Purchasing a resource or service as we use it (ie. for the cloud), consumption based

Question 3

Infrastructure as a Service - Responsibilities of Provider/Customer

Answer 3

Responsibility of Azure:
- H/V VM
- Compute
- Network
- Storage

Responsibility of Customer: (Azure helps with tooling)
- Data
- Application
- Runtime
- OS

examples: VMs

Question 4

Platform as a Service- Responsibilities of Provider/Customer

Answer 4

Responsibility of Azure:
- Runtime
- OS
- H/V VM
- Compute
- Network
- Storage

Responsibility of Customer: (Azure helps with tooling)
- Data
- Application

examples: Serverless (Functions, Logic Apps)

Question 5

Software as a Service- Responsibilities of Provider/Customer

Answer 5

Delivery of business value, application, etc. The customer is not responsible for anything except using the product.

examples: Microsoft 365

Question 6

Public Cloud

Answer 6

• Opex
• Limitless
• Many Regions
• Many Services
• Over the internet

Question 7

Hybrid Cloud

Answer 7

public and private cloud
- seamless
- Use Azure Arc

Question 7

Private Cloud

Answer 7

• Capex
• Hypervisor

Question 8

Reliability

Answer 8

• Auto Healing
• Storage (x3)
• Auto Scale
• SLA
• Design for failure (multi-region)
• Monitor

Question 9

Predictability

Answer 9

• SKU (defined compute, memory, IOps, etc.)
• Behavior (pricing, tools)
• Use templates (Json, Terraform, etc.)
• Automation (Devops, pipelines, CI/CD)

Question 10

Region

Answer 10

Multiple datacenters in a latency envelope
- 2 ms latency window

Special regions - sovereign regions (US Govt cloud)

Choosing regions
- Performance
- Regulatory
- Disaster Recovery

Question 11

Region pairs

Answer 11

• Disaster Recovery
• Two regions hundreds of miles apart
• Used for resiliency (updates are applied to only one region first)

Question 12

Availability Zones

Answer 12

• Independent power, cooling, networking in separate data centers
• Three Availability Zones per Region
• Services can be Zonal or Zone redundant

Question 13

Resource Groups

Answer 13

• Multiple regions
• Multiple resources
• Shared lifecycles
• Role based access control
• Policy
• Budget
• Metadata (tagging)
• One resource is in one resource group
• Flat structure (can’t have a resource group in another one)

Question 14

Subscription

Answer 14

Base unit of an agreement between the customer and Microsoft
- Billing boundary
- Has one and only one Azure AD Tenant
- Budget
- Policy
- Resource Group inherits the subscription metadata
- Limits (soft vs. hard limits)

Question 15

Management Groups

Answer 15

One Azure AD Tenant root with a hierarchy of groups inherited down
- Access Control
- Policy
- Budget

Question 16

Azure Resource Manager

Answer 16

Everything in Azure is a resource
- Access control
- tags

ARM is an endpoint to the resource (portal, powershell, az cli, REST, API, etc.)

Everything in Azure is stored in JSON ARM template(a declarative template) or BICEP (human friendly translated to JSON)

Question 17

Azure Arc

Answer 17

Extends the Azure control plane to services outside of Azure (on prem, other clouds, etc.)

Arc-enabled server
- Runs inside the OS
- Enables the resource to be arc enabled