4.2 Cloud models

Question 1

What is cloud computing?

Answer 1

On-demand access to computing resources such as CPU, storage, and networking delivered over the internet.

Cloud computing allows users to access and utilize computing resources without direct active management.

Question 2

What is a key advantage of global accessibility in cloud computing?

Answer 2

Cloud services can be deployed anywhere in the world with access to large-scale resources.

This enables businesses to reach a global audience and utilize resources efficiently.

Question 3

What does rapid deployment mean in cloud computing?

Answer 3

Applications and services can be deployed almost instantly without building physical infrastructure.

This feature enhances agility and responsiveness to market demands.

Question 4

What is scalability in cloud computing?

Answer 4

The ability to increase or decrease resources based on demand.

Scalability ensures that resources can be adjusted to meet varying workloads.

Question 5

What is elasticity in cloud computing?

Answer 5

Automatically scaling resources up or down to match workload needs, helping control costs.

Elasticity allows for efficient resource utilization and cost management.

Question 6

What is geographical flexibility in the cloud?

Answer 6

The ability to deploy applications in regions closest to users to improve performance and reduce latency.

This feature enhances user experience by minimizing delays.

Question 7

What is a public cloud?

Answer 7

Cloud services provided by third-party vendors and accessed over the internet.

Public clouds are typically available to multiple customers.

Question 8

Give examples of public cloud providers.

Answer 8

• Microsoft Azure
• Amazon Web Services (AWS)

These providers offer a range of cloud services to businesses and individuals.

Question 9

What is a private cloud?

Answer 9

Cloud infrastructure built and managed within an organization’s own data center.

Private clouds offer enhanced security and control for organizations.

Question 10

What is a main advantage of a private cloud?

Answer 10

Greater control over security, data, and infrastructure.

Organizations can customize their cloud environment to meet specific needs.

Question 11

What is a community cloud?

Answer 11

A shared cloud infrastructure used by multiple organizations with similar needs.

Community clouds help organizations collaborate while sharing costs.

Question 12

Why would organizations use a community cloud?

Answer 12

To share costs while meeting common regulatory or operational requirements.

This model is beneficial for organizations with similar compliance needs.

Question 13

What is Infrastructure as a Service (IaaS)?

Answer 13

A cloud model where the provider supplies hardware resources, and the customer manages the OS, applications, and data.

IaaS offers flexibility in managing computing resources.

Question 14

What is a key advantage of IaaS?

Answer 14

High flexibility and control over the operating system and applications.

Customers can tailor their environments to specific requirements.

Question 15

What is a disadvantage of IaaS?

Answer 15

It requires more management and maintenance by the customer.

Customers must have the expertise to manage their infrastructure.

Question 16

What is Software as a Service (SaaS)?

Answer 16

On-demand software where the provider manages everything, including updates and data.

SaaS simplifies software management for users.

Question 17

Give examples of SaaS.

Answer 17

• Google Mail
• Microsoft 365

These applications are accessible via the internet without local installation.

Question 18

What does the user manage in a SaaS model?

Answer 18

Only user access and configuration—no infrastructure or software maintenance.

This allows users to focus on using the software rather than managing it.

Question 19

What is Platform as a Service (PaaS)?

Answer 19

A cloud model that provides a platform for developing and running applications while the provider manages the underlying infrastructure.

PaaS streamlines the development process for developers.

Question 20

What is the customer responsible for in PaaS?

Answer 20

Developing and managing their own applications.

Customers can focus on application development without worrying about infrastructure.

Question 21

Give an example of PaaS.

Answer 21

Salesforce’s application development platform.

This platform provides tools for building and deploying applications.

Question 22

What is the cloud responsibility matrix?

Answer 22

A comparison showing which components are managed by the cloud provider and which are managed by the customer across IaaS, PaaS, and SaaS.

This matrix helps clarify responsibilities in cloud service models.

Question 23

Which cloud model gives the customer the most responsibility?

Answer 23

Infrastructure as a Service (IaaS).

Customers have significant control over their infrastructure in this model.

Question 24

Which cloud model gives the customer the least responsibility?

Answer 24

Software as a Service (SaaS).

The provider manages most aspects of the service in this model.