Cloud Computing

5 minutes 5 Questions

Cloud computing is the delivery of computing services over the internet, where users can access and utilize resources, applications, and storage on demand. Cloud service providers manage the infrastructure, software, and security, allowing users to focus on their core business objectives. There are three primary cloud service models: Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS). Additionally, there are three main cloud deployment models: public cloud, private cloud, and hybrid cloud. Cloud computing provides scalability, flexibility, cost efficiency, and remote access to users.

Guide: Cloud Computing and CompTIA A+

What is Cloud Computing?
Cloud computing is a method of delivering technology services by sharing computing resources instead of using local servers or personal devices. It utilizes internet-based servers for applications, storage, and other computing needs.

Why is Cloud Computing Essential?
Cloud computing is crucial as it provides scalability, flexibility, and efficiency to businesses. Its pay-as-you-go model reduces capital expenditure. It facilitates remote access, thus endorsing geographically dispersed teamwork.

How Does Cloud Computing Work?
Cloud computing works in a centralized server by hosting data and applications. This data can be accessed and worked upon remotely using internet connectivity.

Exam Tips: Answering Questions on Cloud Computing
1. Understand the basics: Be sure about the fundamentals of Cloud Computing like SaaS, PaaS, and IaaS.
2. Practical knowledge: Be familiar with cloud service platforms such Amazon Web Services (AWS), Google Cloud, etc.
3. Real-life scenarios: Be prepared to answer how cloud computing can solve real-life problems.
4. Security: Understand the security aspects as well, like encryption and firewall protection.–

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Question 1

A company's web server is running out of storage space and requires a quick solution. Which cloud service model is best suited for this scenario?

CaaS IaaS PaaS SaaS

Correct Answer: IaaS

The correct answer is IaaS (Infrastructure as a Service). This is because IaaS provides the best solution for running out of storage on a web server, as it provides raw storage capacity, network, and virtual server resources. This allows the company to immediately scale up storage capacity on demand, without having to invest in physical storage infrastructure. On the other hand, SaaS (Software as a Service) is more about using software applications over the internet on a subscription basis and is not specifically designed to cope with storage scalability. PaaS (Platform as a Service) provides a platform for software development and deployment, and it's not the best fit for dealing with storage issues. And CaaS (Container as a Service) is more for managing and deploying software containers, not for scalable storage.

Question 2

A company needs to migrate their on-premises Exchange server to a cloud-hosted solution to reduce the burden of managing the server. Which cloud computing service model should be considered?

IaaS SaaS CaaS PaaS

Correct Answer: SaaS

Software as a Service (SaaS) is the best choice for this company. SaaS migrates the on-premises Exchange server to a cloud-hosted solution, such as Microsoft's Office 365, where the software is delivered over the internet and managed by a third-party vendor. The company doesn't have to worry about managing the server or infrastructure which significantly reduces their workload. In contrast, Infrastructure as a Service (IaaS) is when the company still has to manage some parts of the infrastructure, such as the middleware, runtime, applications, and data. Platform as a Service (PaaS) is a cloud computing model in which a third-party provider delivers hardware and software tools, but the company would still need to manage the applications and data. Containers as a Service (CaaS) is a cloud service model that allows developers to manage and deploy containers, orchestration, and computational resources. This would not be suitable for reducing the company's server management burden as it still requires the company to manage some parts of the infrastructure.

Question 3

A small business wants an affordable solution where they can focus on developing their applications without needing to manage the underlying infrastructure. Which cloud computing service model fits their needs?

SaaS IaaS CaaS PaaS

Correct Answer: PaaS

PaaS (Platform as a Service) is the correct answer. This is because PaaS delivers a platform to users, allowing them to develop, run, and manage applications without the complexity of building and maintaining the infrastructure typically associated with app development and launch. Thus, PaaS meets the small business's need to focus on developing their applications and not on managing the underlying infrastructure. IaaS (Infrastructure as a Service) is not the best fit as it does provide access to the underlying infrastructure but still requires the user to manage it. SaaS (Software as a Service) doesn’t fit because it is software delivery model where the service provider hosts the application and users can access it over the internet; it doesn’t provide an environment for development. CaaS (Container as a Service) doesn't fit the description either as it specifically involves container-based virtualization for application deployment and may not necessarily free the user from infrastructure management.

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