Describe cloud concepts (15-20%) Flashcards
Define cloud computing
Cloud Computing is the delivery of computing services, such as servers, storage, databases, networking, software, analytics, intelligence and more, over the internet (the cloud)
Which pricing model is typically used for cloud computing?
The pay-as-you-go pricing model is used. You typically pay only for the cloud services you use.
How does the pay-as-you-go pricing model help businesses?
Lower your operating costs.
Run your infrastructure more efficiently.
Scale as your business needs change.
What does the cloud provider maintain?
The cloud provider takes care of maintaining the underlying infrastructure, such as CPUs and storage in your datacenter.
Why should I move to the cloud?
The cloud helps you move faster and innovate in ways that were once nearly impossible.
- Teams deliver new features to their users at record speeds.
- Users expect an increasingly rich and immersive experience with their devices and with software.
What on-demand access does the cloud provide?
- A nearly limitless pool of raw compute, storage, and networking components.
- Speech recognition and other cognitive services that help make your application stand out from the crowd.
- Analytics services that deliver telemetry data from your software and devices.
What are several benefits that a cloud environment has over a physical environment?
- High availability
- Scalability
- Elasticity
- Agility
- Geo-distribution
- Disaster recovery
Define High availability?
High availability is a quality of a system or component that assures a high level of operational performance for a given period of time.
Scalability: What are the two ways that applications in the cloud can be scaled?
Vertically: Computing capacity can be increased by adding RAM or CPUs to a virtual machine.
Horizontally: Computing capacity can be increased by adding instances of a resource, such as adding more virtual machines to your configuration.
what is elasticity in cloud computing?
Cloud-based applications can be configured to take advantage of autoscaling, so your applications will always have the resources they need.
Why is agility important in the cloud?
Cloud-based resources can be deployed and configured quickly as your application requirements change.
How is Geo-distribution used in cloud computing?
Applications and data can be deployed to regional datacenters around the globe, so your customers always have the best performance in their region.
What is the advantage of cloud computing with regards to disater recovery?
By taking advantage of cloud-based backup services, data replication, and geo-distribution, you can deploy your applications with the confidence that comes from knowing that your data is safe in the event that disaster should occur.
What are cloud service models?
Infrastructure as a service (IaaS)
Platform as a service (PaaS)
Software as a service (SaaS)
Describe IaaS
This cloud service model is the closest to managing physical servers. A cloud provider keeps the hardware up to date, but operating system maintenance and network configuration is left to the cloud tenant.
Describe PaaS
This cloud service model is a managed hosting environment. The cloud provider manages the virtual machines and networking resources, and the cloud tenant deploys their applications into the managed hosting environment.
Describe SaaS
In this cloud service model, the cloud provider manages all aspects of the application environment, such as 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.
What is serverless computing?
In understanding the definition of serverless computing, it’s important to note that servers are still running the code. The serverless name comes from the fact that the tasks associated with infrastructure provisioning and management are invisible to the developer.
How does serverless computing assist developers?
Enables developers to build applications faster by eliminating the need for them to manage infrastructure. With serverless applications, the cloud service provider automatically provisions, scales, and manages the infrastructure required to run the code. Serverless architectures are highly scalable and event-driven. They use resources only when a specific function or trigger occurs.
What are three deployment models for cloud computing?
Public cloud, private cloud, and hybrid cloud.
Describe public cloud?
Services are offered over the public internet and available to anyone who wants to purchase them. Cloud resources like servers and storage are owned and operated by a third-party cloud service provider and delivered over the internet.
Describe private cloud?
Computing resources are used exclusively by users from one business or organization. A private cloud can be physically located at your organization’s on-site datacenter. It also can be hosted by a third-party service provider.
Describe hybrid cloud?
This computing environment combines a public cloud and a private cloud by allowing data and applications to be shared between them.
What is Azure?
Azure is a continually expanding set of cloud services that help your organization meet your current and future business challenges.
