Service Models

Question 1

What is Software as a Service?

Answer 1

A cloud computing model that delivers applications over the Internet, allowing users to access software applications from any device with an Internet connection without the need for local installation.

Question 2

What is Platform as a Service?

Answer 2

An environment for developers to create, deploy, and manage application code, in the cloud. This eliminates the need for managing the runtime environment, operating systems, and hardware.

Question 3

What is Infrastructure as a Service?

Answer 3

Offers virtualized computing resources that can be accessed via the Internet, enabling users to scale and manage hardware, storage, and network capabilities online without physical hardware investment.

Question 4

What is the Shared Responsibility Model in the cloud important?

Answer 4

Understanding that the security and management tasks are divided between Cloud service providers (CSPs) and customers.
Identifying these responsibilities vary by service model.

Question 5

What are examples of these responsibilities?

Answer 5

IaaS (Infrastructure as a Service)
CSP responsibilities
Physical servers, storage, and networking.
Customer responsibilities
Operating systems, applications, data, and access management.

Question 6

PaaS (Platform as a Service)

Answer 6

CSP responsibilities
Physical servers, storage, networking, runtime environment, operating systems.
Customer responsibilities
Applications, data, and access to the environment.

Question 7

SaaS (Software as a Service)

Answer 7

CSP responsibilities
Managing infrastructure (physical servers, storage, middleware, networking), applications, and security of the platform.
Customer Responsibilities
Managing user access and protecting user data.

Question 8

What is elasticity in cloud computing?

Answer 8

This refers to the ability to dynamically scale computing resources up or down based on demand.
This feature allows for efficient resource utilization, ensuring that applications can handle varying workloads without manual intervention.

Question 9

What is scalability in the cloud?

Answer 9

The capability to expand or reduce resources and services according to the changing demands of applications
This enables systems to accommodate growth seamlessly, ensuring consistent performance and user experience as workload requirements evolve.
Note - the focus on scalability is the ability of the system to grow, long-term

Question 10

What is on-demand access in the cloud?

Answer 10

This allows users to automatically provision computing resources as needed without requiring human interaction with each service provider.
This characteristic enables immediate access and control over resources according to the users’ requirements.

Question 11

What is broad network access in the cloud?

Answer 11

Ensures that services are available over the network and can be accessed through standard mechanisms by a wide range of devices, including:
Mobile phones
Tablets
Laptops
Workstations
This characteristic allows users to
Access applications and data from anywhere
Provides mobility and convenience