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POORNIMA UNIVERSITY

COURSE-MBASUBJECT-INFORMATION TECHNOLOGY

TOPIC-CLOUD COMPUTING

PRESENTED BY-SURBHI CHOUDHARYMONIKA RANIJUHI MADANANIL SHARMA

INTRODUCTION

Cloud computing means instead of all the computer hardware and software you are using sitting on your desktop or inside your company network, it provide service by another company and accessed over the internet. Cloud computing is a buzzword that means different things to different people. Cloud computing is a type of internet based computing that provides share computer processing resource and data to computer and other devices

WHAT IS CLOUD COMPUTING ?

Cloud computing is a combination of software and hardware based computing resource delivered as a network service.

BASIC CONCEPTS There are certain services and models

working behind the scene making the cloud computing feasible and accessible to end user. The models for cloud computing :

Deployment Models Service Models

DEPLOYMENT MODELSDeployment models represent the exact

category of cloud enviroment and are mainly distinguised by the proprietorship, size and access. It tells about the purpose and the nature of cloud. Cloud can have four types of access:

Public CloudPrivate CloudHybrid CloudCommunity Cloud

PUBLIC CLOUD The Public Cloud allows system and

services to be easily accessible to the general public. Public cloud may be less secure because of its openes

PRIVATE CLOUD The Private cloud allows systems and

services to be accessible within an organization. It offers increased security because of its private nature

COMMUNITY CLOUD The Community Cloud allows system

and services to be accessible by group organizations

HYBRID CLOUD The Hybrid Cloud is a mixture of

public and private cloud. However, the critical activities are performed using private cloud while the non-critical activities are performed using public cloud.

SERVICES MODELSServices Models are the refrence models

on which the cloud computing is based. These can be categorized into three basic services models are listed below:

1) Infrastructure as a service (Iaas)2) Platform as a service (Paas)3) Software as a service (Saas)

INFRASTRUCTURE AS A SERVICE (Iaas)Infrastructure is the delivery of technology as

an demand scalable services IaaS provides access to fundamental

resources such as physical machines, virtual machines, virtual storages etc.

Usually billed based on usageUsually multi tenant virtualized enviromentCan be coupled with managed services for os

and application support

IaaS Examples

PLATFORM AS A SERVICE (PaaS)PaaS provides the runtime enviroment for

applications, devlopment & deployment tools etc.

PaaS provides all of the facilities required to support the complete life cycle of building and delivering web applications and services entrily from the internet.

Typically applications must be devloped with a particular platform in mind

PaaS Examples

SOFTWARE AS A SERVICE (Saas)SaaS model allows to use software

application as a service to end users.

SaaS is a software delivery mehology that provides licensed multi-tenant access to software and its functions remotly as a web-based service.

SaaS Examples

ADVANTAGELow computer costsImproved performanceReduced software costInstant software updatesImproved document format compatibilityUnlimited storage capacityIncreased data reliabilityUniversal document access

DISADVANTAGERequires a constant internet connectionDoes not work well with low-speed

connectionsFeatures might be limitedStored data can be lost

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