Cloud Computing Overview Flashcards
What is cloud computing?
The on-demand delivery of compute power, database storage, applications, and other IT resources
What is private cloud?
Cloud services used by a single organization, not exposed to the public.
What is public cloud?
Cloud services owned and operated by a third-party cloud service provider delivered over the internet.
What is hybrid cloud?
We’re going to keep some servers on-premises and extend some of the capabilities into the cloud
What are the 5 characteristics of cloud computing?
- On-demand self service
- Broad network access
- Multi-tenancy and resource pooling
- Rapid elastic and scalability
- Measured service
What is multi-tenancy in relation to cloud computing?
Multiple customers can share the same infrastructure and applications with security and privacy
What is resource pooling in relation to cloud computing?
Multiple customers are serviced from the same physical resources
What does it mean to say cloud computing has rapid elasticity?
Automatically and quickly acquire and dispose of resources when needed
What are the six advantages of cloud computing?
- Trade capital expense (CAPEX) for operational expense (OPEX)
- Benefit from massive economics of scale
- Stop guessing capacity
- Increase speed and agility
- Stop spending money running and maintaining data centers
- Go global in minutes: leverage the AWS global infrastructure
How does the cloud solve problems related to flexibility?
Change resource type when needed
How does the cloud solve problems related to cost-effectiveness?
Pay as you go, for what you use
How does the cloud solve problems related to scalability?
Accommodate larger loads by making hardware stronger or adding additional nodes
How does the cloud solve problems related to elasticity?
Ability to scale out and scale in when needed
How does the cloud solve problems related to high-availability and fault-tolerance?
Build across data centers
How does the cloud solve problems related to agility?
Rapidly develop, test, and launch software applications
What are the 3 types of cloud computing?
- Infrastructure as a service (IaaS)
- Platform as a service (PaaS)
- Software as a service (SaaS)
What is Infrastructure as a service?
Provide building blocks for cloud IT
Provides networking, computers, data storage space
Highest level of flexibility
Easy parallel with traditional on-premises IT