Cloud Computing Flashcards
What is Cloud Computing?
Cloud computing is the on-demand delivery of compute power, database storage, applications, and other IT resources
Through a cloud services platform with pay-as-you-go pricing
You can provision exactly the right type and size of computing resources you need
You can access as many resources as you need, almost instantly
Simple way to access servers, storage, databases and a set of application services
Amazon Web Services owns and maintains the network-connected hardware required for these application services, while you provision and use what you need via a web application.
What is Public Cloud
Cloud resources owned and operated by a thirdparty cloud service provider delivered over the Internet.
What is Private Cloud
Cloud services used by a single organization, not exposed to the public.
Complete control
Security for sensitive applications
Meet specific business needs
Hybrid Cloud
Keep some servers on premises and extend some capabilities to the Cloud
Control over sensitive assets in your private infrastructure
Flexibility and costeffectiveness of the public cloud
The Five Characteristics of Cloud Computing
On-demand self service:
Users can provision resources and use them without human interaction from the service provider
Broad network access:
Resources available over the network, and can be accessed by diverse client platforms
Multi-tenancy and resource pooling:
Multiple customers can share the same infrastructure and applications with security and privacy
Multiple customers are serviced from the same physical resources
Rapid elasticity and scalability:
Automatically and quickly acquire and dispose resources when needed
Quickly and easily scale based on demand
Measured service:
Usage is measured, users pay correctly for what they have used
Six Advantages of Cloud Computing
Trade capital expense (CAPEX) for operational expense (OPEX)
Pay On-Demand: don’t own hardware
Reduced Total Cost of Ownership (TCO) & Operational Expense (OPEX)
Benefit from massive economies of scale
Prices are reduced as AWS is more efficient due to large scale
Stop guessing capacity
Scale based on actual measured usage
Increase speed and agility
Stop spending money running and maintaining data centers
Go global in minutes: leverage the AWS global infrastructure
Problems solved by the Cloud
Flexibility: change resource types when needed
Cost-Effectiveness: pay as you go, for what you use
Scalability: accommodate larger loads by making hardware stronger or adding additional nodes
Elasticity: ability to scale out and scale-in when needed
High-availability and fault-tolerance: build across data centers
Agility: rapidly develop, test and launch software applications
Types of Cloud Computing
Infrastructure as a Service (IaaS)
Platform as a Service (PaaS)
Software as a Service (SaaS)
Infrastructure as a Service (IaaS)
Provide building blocks for cloud IT
Provides networking, computers, data storage space
Highest level of flexibility
Easy parallel with traditional on-premises IT
Platform as a Service (PaaS)
Removes the need for your organization to manage the underlying infrastructure
Focus on the deployment and management of your applications
Software as a Service (SaaS)
Completed product that is run and managed by the service provider
What is edge location
Also known as AWS Points of Presence
Caches AZ contents and ensures low latency by placing content closer to users
Amazon has 216 Points of Presence (205 Edge Locations & 11 Regional Caches) in 84 cities across 42 countries
netflix
What is a local zone
It is an extension of a local region
lower latency like for gamers
How to choose an AWS Region?
Compliance with data governance and legal requirements: data never leaves a region without your explicit permission
Proximity to customers: reduced latency
Available services within a Region: new services and new features aren’t available in every Region
Pricing: pricing varies region to region and is transparent in the service pricing page
Are most AWS services region-scoped?
Yes
