Cloud Models( Comptia Objective 4.1)

Question 1

What is IaaS?

Answer 1

It is a cloud model known as Infrastructure As A Service. Or sometimes Hardware As A Service( HaaS)

Question 2

How does IaaS work?

Answer 2

• You outsource( purchase) your needed equipment for your cloud from a 3rd party.
• You are still responsible for the management of this equipment it’s OS and applications data and for it’s security.

Question 3

What is SaaS?

Answer 3

It is a cloud model known as Software As A Service

Question 4

How does Saas work?

Answer 4

With Saas( Software As A Service) a Third Party provides you remote access to OS, applications and is responsible for managing it’s data for you. E.G. taking care of payroll info in cloud based accounting software. Another example would be gmail/ outlook etc which manages your email.

Question 5

What is PaaS?

Answer 5

It is a cloud model known as Platform As A Service.

Question 6

How does Paas work?

Answer 6

With PaaS you do not need to worry about servers, or other network equipment or for any of the software either. The platform is completely handled by a Third Party and all you are responsible for the development./ designing.

Question 7

What is a con of PaaS?

Answer 7

You don’t have direct control of your data, people or infrastructure, trained IT professionals are watching your stuff.

Question 8

Definition of a Private Cloud model?

Answer 8

• Your own virtualized local data center

Question 9

Definition Of a Public Cloud model?

Answer 9

• Available to everyone over the internet

Question 10

Definition Of a Hybrid Cloud Model?

Answer 10

• A mix of public and private cloud model.

Question 11

Definition Of a Community Cloud model?

Answer 11

• Several organizations share the same resources.

Question 12

Differences between an Internal Cloud and an External Cloud?

Answer 12

• Internal Cloud means no resources are shared, you build you own model, pay for everything up front but then have no ongoing costs
• External Cloud means you share resources with a public cloud, owned by a third party, cost may be metered up front.

Question 13

What is a metered cloud service?

Answer 13

• You pay for what you use, cost to upload, store and download.

Question 14

What is a Non-metered cloud service?

Answer 14

• You pay for a block of storage
• No cost to upload
• No cost to download fixed amount paid as flat fee.

Question 15

When it comes to Cloud computing characteristics what does Rapid Elasticity mean?

Answer 15

• Ability to scale up or scale down as needed

- Seamless to everyone.

Question 16

When it comes to cloud characteristics what is On-Demand self service?

Answer 16

• Adding software, networks, servers and storage as needed with a click of a button. aka instant resource provisioning.

Question 17

When it comes to cloud characteristics what is Resource Pooling?

Answer 17

• All of the computer power in one place. E.G using a powerful computer to virtualize several other machines.
• One large resource instead of many small resources

Question 18

When it comes to cloud characteristics what is Measured Service?

Answer 18

• Costs and utilization are very closely tracked enabling you to take care of resource planning.