Describe cloud concepts

Question 1

Define cloud computing

Answer 1

It’s the delivery of computing services over the internet, which is otherwise known as the cloud. These services include servers, storage, databases, networking, software, analytics, and intelligence.
It doesn’t have to be constrained by physical infrastructure the same way that a traditional datacenter is.

Question 2

Describe the shared responsibility model

Answer 2

The responsibilities shared between the consumer and the cloud provider. Consumer is responsible for information and data stored in the cloud, the accounts and identities of the people, services and devices within the organization and the cloud provider is responsible maintaining physical datacenter, network and hosts.

Question 3

Define cloud models, including public, private, and hybrid

Answer 3

Private cloud
It’s a cloud that’s built, controlled, and maintained by a single entity. Private cloud provides much greater control for the company and its IT department. However, it also comes with greater cost and fewer of the benefits of a public cloud deployment. Finally, a private cloud may be hosted from your on site datacenter. It may also be hosted in a dedicated datacenter offsite, potentially even by a third party that has dedicated that datacenter to your company.
Public cloud
A public cloud is built, controlled, and maintained by a third-party cloud provider. With a public cloud, anyone that wants to purchase cloud services can access and use resources. The general public availability is a key difference between public and private clouds.
Hybrid cloud
A hybrid cloud is a computing environment that uses both public and private clouds in an inter-connected environment. A hybrid cloud environment can be used to allow a private cloud to surge for increased, temporary demand by deploying public cloud resources. Hybrid cloud can be used to provide an extra layer of security. For example, users can flexibly choose which services to keep in public cloud and which to deploy to their private cloud infrastructure.

Question 4

Identify appropriate use cases for each cloud model

Answer 4

Public cloud
No capital expenditures to scale up.
Applications can be quickly provisioned and deprovisioned.
Organizations pay only for what they use.

Private cloud
Hardware must be purchased for start-up and maintenance.
Organizations have complete control over resources and security.
Organizations are responsible for hardware maintenance and updates.

Hybrid cloud
Provides the most flexibility.
Organizations determine where to run their applications.
Organizations control security, compliance, or legal requirements.

Question 5

Describe the consumption-based model

Answer 5

Consumption-based model means that end users only pay for the resources that they use. Whatever they use is what they pay for.

Some of the benefits of this models are as below:

1) No upfront costs.
2) No need to purchase and manage costly infrastructure that users might not use to its fullest.
3) The ability to pay for additional resources when they are needed.
4) The ability to stop paying for resources that are no longer needed.

Question 6

Compare cloud pricing models