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Contents Introduction Characteristics Service Models Deployment Models Purpose of Cloud Computing Advantages of Cloud Computing Disadvantages of Cloud Computing

INTRODUCTION

Cloud computing is the use of computing resources (hardware and software) that are delivered as a service over the Internet.

When you store your photos online instead of on your home computer, or use webmail or a social networking site, you are using a “cloud computing” service.

Cloud Computing promotes availability and is composed of

Five essential characteristics

Three service models and

Four deployment models

CHARACTERISTICS

There are five key characteristics of cloud computing:

On-demand self service Broad network access Resource pooling Rapid elasticity and Measured service

SERVICE MODELS

Service Models are the reference models on which the Cloud Computing is based. These can be categorized into three basic service models:

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

Cloud ClientsWeb browser, mobile app, clients

PaaSDatabase, web server, deployment

tools

IaaSVirtual machines, storage, networks

SaaSCRM, Email, games, virtual desktopApplication

Platform

Infrastructure

DEPLOYMENT MODELSDeployment models define the type of access to the cloud. These are:

Private cloud Community cloud Public cloud and Hybrid cloud

PURPOSE OF CLOUD COMPUTING

By using the Cloud infrastructure on “pay as used and on demand”, all of us can save in capital and operational investment!

Clients can:Put their data on the platform instead of on their own desktop PCs and/or on their own servers.They can put their applications on the cloud and use the servers within the cloud to do processing and data manipulations etc.

Lower Computer

Cost

Improved Performance

Increased data

reliability

Universal document

access

Reduced software

costs

Unlimited storage capacity

Improved document

format compatibility

Instant software updates

Advantages

DISADVANTAGES OF CLOUD COMPUTING

Requires a constant Internet connectionDoes not work well with low-speed connectionsFeatures might be limitedStored data might not be secure

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