Cloud basics

Question 1

What is cloud computing?

Answer 1

Delivery of computing services over the Internet using a pay-as-you-go pricing model.

Because cloud computing uses the internet to deliver these services, it doesn’t have to be constrained by physical infrastructure the same way that a traditional datacenter is. That means if you need to increase your IT infrastructure rapidly, you don’t have to wait to build a new datacenter—you can use the cloud to rapidly expand your IT footprint.

Question 2

What basic services provided by cloud computing?

Answer 2

• Compute power (how much processing your computer can do)
• Storage (volume of data you store on your device)

Question 3

Examples of computing services/ cloud services

Answer 3

Computing services include common IT infrastructure such as virtual machines, storage, databases, and networking. Cloud services also expand the traditional IT offerings to include things like Internet of Things (IoT), machine learning (ML), and artificial intelligence (AI).

Question 4

What is the shared responsibility model

Answer 4

With the shared responsibility model, these responsibilities get shared between the cloud provider and the consumer. Physical security, power, cooling, and network connectivity are the responsibility of the cloud provider.

the consumer is responsible for the data and information stored in the cloud. (You wouldn’t want the cloud provider to be able to read your information.) The consumer is also responsible for access security, meaning you only give access to those who need it.

Question 5

Describe the pay-as-you go characteristic of the cloud

Answer 5

Pay-as-you-go: You’re billed only for what you use.

Instead of maintaining CPUs and storage in your data center, you rent them for the time that you need them

The cloud provider takes care of maintaining the underlying infrastructure for you.

Question 6

When using a cloud provider, you’ll always be responsible for:

Answer 6

The information and data stored in the cloud
Devices that are allowed to connect to your cloud (cell phones, computers, and so on)
The accounts and identities of the people, services, and devices within your organization

Question 7

The cloud provider is always responsible for:

Answer 7

The physical datacenter
The physical network
The physical hosts

Question 8

Private cloud

Answer 8

It’s a cloud (delivering IT services over the internet) that’s used 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.

Question 9

Public cloud

Answer 9

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.

Question 10

Hybrid cloud

Answer 10

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 11

How does financial expenditure differ from the cloud service model?

Answer 11

Public cloud
Organizations pay only for what they use

Private cloud
Hardware must be purchased for startup and maintenance

Hybrid cloud
Organizations control security, compliance, or legal requirements

Question 12

What is the fourth cloud service model?

Answer 12

In a multi-cloud scenario, you use multiple public cloud providers. Maybe you use different features from different cloud providers. Or maybe you started your cloud journey with one provider and are in the process of migrating to a different provider.

Regardless, in a multi-cloud environment you deal with two (or more) public cloud providers and manage resources and security in both environments.

Question 13

What is the Azure Arc?

Answer 13

Azure Arc is a set of technologies that helps manage your cloud environment. Azure Arc can help manage your cloud environment, whether it’s a public cloud solely on Azure, a private cloud in your data centre, a hybrid configuration, or even a multi-cloud environment running on multiple cloud providers simultaneously.

Question 14

What if you’re already established with VMware in a private cloud environment but want to migrate to a public or hybrid cloud?

Answer 14

Azure VMware Solution lets you run your VMware workloads in Azure with seamless integration and scalability.

Question 15

When comparing IT infrastructure models, there are two types of expenses to consider.

Answer 15

Capital expenditure (CapEx) and operational expenditure (OpEx).

Question 16

What is Capital expenditure?

Answer 16

CapEx is typically a one-time, up-front expenditure to purchase or secure tangible resources. A new building, repaving the parking lot, building a data centre, or buying a company vehicle are examples of CapEx.

Question 17

What is operational expenditure?

Answer 17

OpEx is spending money on services or products over time. Renting a convention centre, leasing a company vehicle, or signing up for cloud services are all examples of OpEx.

Question 18

Which expenditure does cloud computing fall under?

Answer 18

Cloud computing falls under OpEx because cloud computing operates on a consumption-based model. With cloud computing, you don’t pay for the physical infrastructure, the electricity, the security, or anything else associated with maintaining a datacenter. Instead, you pay for the IT resources you use. If you don’t use any IT resources this month, you don’t pay for any IT resources.

Question 19

What are the benefits of consumption-based models?

Answer 19

No upfront costs.
No need to purchase and manage costly infrastructure that users might not use to its fullest potential.
The ability to pay for more resources when they’re needed.
The ability to stop paying for resources that are no longer needed.§

Question 20

What are the downsides of a traditional data centre, expenditure-wise?

Answer 20

With a traditional datacenter, you try to estimate the future resource needs. If you overestimate, you spend more on your datacenter than you need to and potentially waste money.

If you underestimate, your data centre will quickly reach capacity and your applications and services may suffer from decreased performance. Fixing an under-provisioned data centre can take a long time. You may need to order, receive, and install more hardware. You’ll also need to add power, cooling, and networking for the extra hardware.

Question 21

Cloud computing is the delivery of computing services over the internet by using a pay-as-you-go pricing model. You typically pay only for the cloud services you use, which helps you:

Answer 21

Plan and manage your operating costs.
Run your infrastructure more efficiently.
Scale as your business needs change.