technology guide three cloud computing. technology guide outline tg3.1 introduction tg3.2 what is...
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TECHNOLOGY GUIDE THREE
Cloud Computing
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TECHNOLOGY GUIDE OUTLINE
TG3.1 Introduction
TG3.2 What Is Cloud Computing?
TG3.3 Different Types of Clouds
TG3.4 Cloud Computing Services
TG3.5 The Benefits of Cloud Computing
TG3.6 Concerns and Risks with Cloud Computing
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LEARNING OBJECTIVES
1. Describe the problems that modern information technology departments face.
2. Describe the key characteristics and advantages of cloud computing.
3. Identify a use-case-scenario for each of the four types of clouds.
4. Explain the operational model of each of the three types of cloud services.
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LEARNING OBJECTIVES
5. Identify the key benefits of cloud computing.
6. Discuss the concerns and risks associated with cloud computing.
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TG 3.1 Evolution of Modern IT Infrastructure
Stand-alone mainframesMainframes and dumb terminalsStand-alone personal computersLocal area networksEnterprise computing (wide area networks and the Internet)Cloud computing and mobile computing
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Problems Faced by Traditional IT Departments
On-premise computing: a type of IT model where a company owns its IT infrastructure (hardware, software, networks, and data management) and maintains that infrastructure internally (or “on premise”)
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Problems Faced by Traditional IT Departments (continued)
* Expensive: IT staff, software licenses, hardware * Funds expended on maintaining existing systems rather than on developing new systems* Can result in a lack of flexibility for the organization to meet rapidly changing business conditions
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TG 3.2 What Is Cloud Computing?
Cloud computing: a type of computing that delivers convenient, on-demand, pay-as-you-go access for multiple customers to a shared pool of configurable computing resources (servers, networks, storage, applications, and services)
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Cloud Computing Characteristics
Provides on-demand self serviceEncompasses grid computingEncompasses utility computingUtilizes broad network accessPools computing resourcesOften occurs on virtualized servers
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Grid Computing
Grid computing: shares the processing resources of many geographically dispersed computers across a network
Provides fault tolerance and redundancyEnables companies to scale up and scale down
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Grid Computing
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Utility Computing
Utility computing: a service provider makes computing resources and infrastructure management available to customers as needed
Customers pay based on usage, not a flat rate
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Utility Computing
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Server Farms
Server farms: massive data centers, which may contain hundreds of thousands of networked computer servers
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Server Virtualization
Server virtualization: uses software-based partitions to create multiple virtual servers – called virtual machines – on a single physical server
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Organizational server farms in relation to the Internet
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TG 3.3 Different Types of Clouds
Public cloud: shared, easily accessible, multi-customer IT infrastructure available nonexclusively to any entity in the general public (individuals, groups, and/or organizations)
Private cloud (internal or corporate cloud): IT infrastructures that can be accessed only by a single entity or by an exclusive group of related entities that share the same purpose
Hybrid cloud: composed of public and private clouds that remain unique entities while offering users the benefits of multiple deployment models
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The Three Types of Clouds
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TG 3.4 Cloud Computing Services
Infrastructure-as-a-Service: cloud computing vendors offer remotely accessible servers, networks, and storage capacity
Platform-as-a-Service: customers rent servers, operating systems, storage, a database, software development technologies, and network capacity over the Internet
Software-as-a-Service: cloud computing vendors provide software over the Internet that is specific to their customers’ requirements
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TG 3.5 Benefits of Cloud Computing
Making individuals more productiveFacilitating collaborationMining insights from dataReducing costsExpand scope of business operationsRespond quickly to market changesCustomize products and services
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TG 3.6 Risks of Cloud Computing
Legacy IT systemsReliabilityPrivacySecurityLegal and regulatory environment