Cloud computing

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What is a private cloud?

A proprietary network or data center that supplies hosted services to a limited number of people

What does Software-as-a-Service cloud computing provide?

The provider provides the hardware infrastructure, and software product and interacts with the user through a front-end portal (e.g. Web-based email, database processing)

Services hosted over the internet are broadly divided into 3 categories. What are they?

-Infrastructure-as-a-Service (IaaS) -Platform-as-a-Service (PaaS) -Software-as-a-Service (SaaS)

How does cloud service differentiate from traditional hosting?

-Sold on demand (typically by the minute or hour) -User can have as much or as little of the service as they want at any given time -Service is fully managed by the provider (User only needs a PC and Internet access)

What is an advantage and disadvantage of Infrastructure-as-a-Service cloud computing?

Advantage: Cloud computing allows a company to only pay for as much capacity as needed Disadvantage: Possibly costly depending on how much usage

What is an advantage and disadvantage of Software-as-a-Service cloud computing?

Advantage: The provider provides everything from hardware infrastructure, the software product, and a front-end portal to interact with the user with. End user is free to use the service from anywhere Disadvantage: N/A?

What is an advantage and disadvantage of Platform-as-a-Service cloud computing?

Advantage: Users can use a provider's platform over the internet Disadvantage: Some providers limit portability of software (e.g. providers may not allow software created by customers to be moved off their platform)

Cloud computing is a general term for what?

Anything that involves delivering hosted services over the Internet.

What is cloud computing?

Internet-based computing where shared resources, software, and information are provided to devices and computers on demand. (pay-for-what-you-use model)

What is the goal of cloud computing?

Provide easy, scalable access to computing resources and IT services

What does Infrastructure-as-a-Service cloud computing provide?

Provides virtual server instances with unique IP addresses and blocks of storage on demand. (e.g. Dropbox/Amazon Web Services)

What is a public cloud?

Public cloud sells services to anyone on the Internet (e.g. Amazon Web Services)

What does Platform-as-a-Service cloud computing provide?

Set of software and product development tools hosted on the provider's infrastructure. Developers can create applications on the provider's platform over the Internet (e.g. Force.com, GoogleApps)


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