Module 2: Different Cloud Service Categories

Question 1

What are the three cloud service models commonly used in cloud computing?

Answer 1

The three cloud service models commonly used in cloud computing are:

1. IaaS (Infrastructure-as-a-Service)
2. PaaS (Platform-as-a-Service)
3. SaaS (Software-as-a-Service)

Question 2

Define IaaS (Infrastructure-as-a-Service)

Answer 2

IaaS is a cloud service model where the cloud provider is responsible for maintaining the hardware infrastructure, while the cloud tenant is responsible for operating system maintenance and network configuration. It provides flexibility and control over the hardware running the applications.

Question 3

Define PaaS (Platform-as-a-Service)

Answer 3

PaaS is a cloud service model where the cloud provider manages the virtual machines and networking resources, while the cloud tenant deploys their applications into the managed hosting environment. It simplifies the deployment and management of applications, allowing developers to focus on coding and application development.

Question 4

Define SaaS (Software-as-a-Service)

Answer 4

SaaS is a cloud service model where the cloud provider manages all aspects of the application environment, including virtual machines, networking resources, data storage, and applications. The cloud tenant only needs to provide their data to the application managed by the cloud provider. It provides ready-to-use software applications accessible over the internet.

Question 5

What are the advantages of IaaS?

Answer 5

The advantages of IaaS include:

1. No upfront costs (CapEx)
2. Rapid deployment of new compute devices
3. Agility in provisioning and deprovisioning
4. Consumption-based pricing (OpEx)
5. Access to cloud provider’s skills and expertise in maintaining the infrastructure

Question 6

What are the advantages of PaaS?

Answer 6

The advantages of PaaS include:

1. No upfront costs (CapEx)
2. Agility in application deployment without server configuration
3. Consumption-based pricing (OpEx)
4. Access to cloud provider’s skills and expertise in platform management
5. Increased productivity and collaboration in application development

Question 7

What are the advantages of SaaS?

Answer 7

The advantages of SaaS include:

1. No upfront costs (CapEx)
2. Quick and easy access to the latest software
3. Pay-as-you-go pricing model
4. No need for deep technical skills
5. Flexibility to access the application data from anywhere

Question 8

What is serverless computing?

Answer 8

Serverless computing is an approach in which developers can build applications without the need to manage infrastructure. In serverless architectures, the cloud service provider handles provisioning, scaling, and management of the underlying infrastructure required to run the code. Developers can focus on writing business logic, and resources are allocated only when specific functions or triggers occur.

Question 9

What are the three deployment models for cloud computing?

Answer 9

The three deployment models for cloud computing are:

1. Public cloud
2. Private cloud
3. Hybrid cloud

Question 10

Describe the public cloud deployment model

Answer 10

In the public cloud deployment model, services are offered over the public internet and available to anyone who wants to purchase them. Cloud resources are owned and operated by a third-party cloud service provider and delivered over the internet.

Question 11

Describe the private cloud deployment model

Answer 11

In the private cloud deployment model, computing resources are used exclusively by users from one business or organization. It can be physically located at the organization’s on-site or on-premises data center or hosted by a third-party service provider.

Question 12

Describe the hybrid cloud deployment model

Answer 12

In the hybrid cloud deployment model, a combination of public and private clouds is used. Data and applications can be shared between the public and private cloud environments. It offers flexibility and allows organizations to take advantage of both cloud models.

Question 13

What are the benefits of migrating to a hybrid cloud environment?

Answer 13

Migrating to a hybrid cloud environment can bring benefits such as reduced costs and decreased administration requirements. By moving resources from on-premises to off-premises, organizations can leverage the advantages of both public and private clouds.