what is cloud

Cloud computing is a set of service (server / database application ) cloud computing is the delevering of computing service like server storage database networking software analyct and intelligent over the internet .

Cloud computing is technology model the provide on demand acess to a pool of computing resources including server storage database networking software and other services over the internet the resource and delivered and manage by cloud service provide and user can access them as needed paying  only for they use 

Advantage :

- hardware cost saving 

- application isolation each virtual enviroment act like a seperate machine 

- improved scalability and availability - virtual resources are easier and faster to create manage compared to getting new hardware 

- pay only for cloud service you use that help to lower your operating cost 

- run your infrastructure move efficiency and scale as your buisness need chnages 

Cloud is divided in two parts on the basis of service model and on the basis deployment model types of clod computing

1. On the basis of deployment model 

i . Public cloud : 

A public cloud is a computing service offered by third-party providers over the internet, where resources like storage, servers, and applications are shared across multiple users or organizations. It’s managed by the provider, scalable, and accessible on-demand, typically on a pay-as-you-go basis. Examples include AWS, Microsoft Azure, and Google Cloud.

ii . private cloud :

A private cloud is a cloud computing environment dedicated to a single organization, offering similar scalability and flexibility as a public cloud but with greater control, security, and customization. It can be hosted on-premises or by a third-party provider, and resources are not shared with other organizations. Examples include VMware vSphere and OpenStack deployment 

iii. hybrid cloud :

A hybrid cloud is a computing environment that combines public and private clouds, allowing data and applications to be shared between them. It offers flexibility to leverage the scalability of public clouds and the control of private clouds, optimizing for cost, security, and performance. Examples include integrating AWS with an on-premises private cloud or using Microsoft Azure Stack.

2 . On the basis of serivice model 

i . IAAS ( Infrastrucre as a service )

 Infrastructure as a Service, is a cloud computing model where a provider delivers virtualized computing resources over the internet, such as servers, storage, and networking. Users can rent and manage these resources on-demand, paying only for what they use. Examples include Amazon EC2, Google Compute Engine, and Microsoft Azure Virtual Machines.

ii. PAAS (Plateform as a service )

PaaS, or Platform as a Service, is a cloud computing model where a provider delivers a platform allowing customers to develop, run, and manage applications without managing the underlying infrastructure (servers, storage, networking). It includes tools, frameworks, and runtime environments. Examples include Google App Engine, Microsoft Azure App Service, and Heroku.

iii. SAAS (Software as a service)

SaaS, or Software as a Service, is a cloud computing model where software applications are hosted by a provider and accessed by users over the internet, typically via a subscription. Users don’t manage the infrastructure or software updates. Examples include Google Workspace, Microsoft 365, and Salesforce.