This document defines and explains cloud computing. Cloud computing allows users to access software and storage over the internet rather than locally on their own computer. It discusses the history of cloud computing concepts dating back to 1950. The key components of cloud include clients, distributed servers located in datacenters, and a central server that administers the system. There are different service models depending on what is provided via the cloud. Cloud services can be deployed in public, private, community, or hybrid models. The popularity of cloud computing is due to advantages like reduced complexity, scalability, and not needing to purchase and maintain own software/servers.

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Cloud computing

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  What is CloudComputing?Distributed computing on internet Ordelivery of computing service over theinternet.Eg: Yahoo!, GMail, Hotmail-Instead of running an e-mailprogram on your computer, you log in to a Web e-mailaccount remotely. The software and storage for youraccount doesn't exist on your computer -- it's on theservice's computer cloud.
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  History Concept evolvedin 1950(IBM) called RJE(Remote Job Entry Process). In 2006 Amazon provided First public cloudAWS(Amazon Web Service).
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  Cloud ComponentsIt hasthree components1.) Client computers2.) Distributed Servers3.) Datacenters
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  ClientsClients are thedevice that the end userinteract with cloud.three types of clients:1.) Mobile2.) Thick3.) Thin (Most Popular)
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  DatacenterIt is collectionofservers whereapplication isplaced and isaccessed viainternet.
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  Distributed serversOften serversare in geographicallydifferent places, but server acts asif they are working next to eachother.
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  Central Server ItAdministers the system such as monitoringtraffic, client demands to ensure everythingruns smoothly. It uses a special type of software calledMiddleware.Middleware allow computer to communicateeach other.
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  Service ModelsSaaS(Software asa service): Requiredsoftware, Operating system & network isprovided.PaaS(Platform as service): Operatingsystem and network is provided.IaaS(Infrastructure as a service): justNetwork is provided.
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  Deployment of CloudServicePublic CloudPrivate CloudCommunity CloudHybrid Cloud(Combined Cloud)
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  Why cloud serviceis popular? Reduce the complexity of networks. Do not have to buy software licenses. Customization. Cloud providers that have specialized in a particulararea (such as e-mail) can bring advanced servicesthat a single company might not be able to affordor develop. scalability, reliability, and efficiency. Info. at cloud are not easily lost.
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  ApplicationSocial Networking sites.E-mailsites.Search Engines.Many more services OVER THE INTERNET.
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  Thank You