Foundations of Cloud Computing Flashcards
What are 6 advantages of cloud computing
- Trade fixed expense for variable expense
- Benefit from massive economies of scale
- Stop guessing capacity
- Increase speed and agility
- Stop spending money running and maintaining data centers
- Go global in minutes
How does the cloud save you money?
Cut costs by using AWS data centers.
Maintain the highest standard of security without having to manage your own facility.
What is high availability?
System that operates continuously without failure for a long time.
These systems avoid loss of service by reducing or managing failures.
What is elasticity?
You don’t have to plan ahead of time how much capacity you need.
You can provision only what you need, and then grow and shrink based on demand.
What is agility?
The cloud gives you increased agility.
All the services you have access to help you innovate faster, giving you speed to market.
What is durability?
All about long-term data protection.
This means your data will remain intact without corruption.
What is Infrastructure as a Service (IaaS)?
Common cloud computing model.
Contains the basic building blocks for cloud IT and typically provides access to networking features, computers (virtual or on dedicated hardware), and data storage space.
Provides you with the highest level of flexibility and management control over your IT resources and is most similar to existing IT resources that many IT departments and developers are familiar with today.
What is Platform as a Service (PaaS)?
Common cloud computing model.
Removes the need for your organization to manage the underlying infrastructure (usually hardware and operating systems) and allows you to focus on the deployment and management of your applications.
This helps you be more efficient as you don’t need to worry about resource procurement, capacity planning, software maintenance, patching, or any of the other undifferentiated heavy lifting involved in running your application.
What is Software as a Service (SaaS)?
Common cloud computing model.
Provides you with a completed product that is run and managed by the service provider.
End-user applications. You do not have to think about how the service is maintained or how the underlying infrastructure is managed; you only need to think about how you will use that particular piece of software.
Example: web-based email which you can use to send and receive email without having to manage feature additions to the email product or maintain the servers and operating systems that the email program is running on.
What is a Cloud deployment model?
Fully deployed in the cloud and all parts of the application run in the cloud.
Applications in the cloud have either been created in the cloud or have been migrated from an existing infrastructure to take advantage of the benefits of cloud computing.
Can be built on low-level infrastructure pieces or can use higher level services that provide abstraction from the management, architecting, and scaling requirements of core infrastructure.
What is a Hybrid deployment model?
Supported by Direct Connect, a hybrid deployment is a way to connect infrastructure and applications between cloud-based resources and existing resources that are not located in the cloud.
The most common method of hybrid deployment is between the cloud and existing on-premises infrastructure to extend, and grow, an organization’s infrastructure into the cloud while connecting cloud resources to the internal system.
What is an On-premises deployment model?
The deployment of resources on-premises, using virtualization and resource management tools, is sometimes called the “private cloud.”
On-premises deployment doesn’t provide many of the benefits of cloud computing but is sometimes sought for its ability to provide dedicated resources.
In most cases this deployment model is the same as legacy IT infrastructure while using application management and virtualization technologies to try and increase resource utilization.
What are Availability Zones (AZs)?
Multi-AZ deployments provide high availability. Systems that are highly available are dependable enough to operate continuously without failure.
An AZ has multiple data centers. You can think of an AZ as a collection of data centers.
What is a Region?
It is global and has 2 or more AZs.
Regions are geographically isolated locations around the globe.
What is are Edge Locations?
Ensure low latency by placing content closer to users. There are more edge locations than Regions and AZs.
