Cloud Computing

Cloud computing is the on-demand delivery of IT resources such as storage, networking resources and computing resources over the Internet with pay-as-you-go pricing. Instead of buying, owning, and maintaining physical data centers and servers, you can access technology services, such as computing power, storage, and databases, on an as-needed basis from a cloud providers irrespective of the organization type or size.
Cloud computing has many advantages over the traditional computing which include;
Cost Efficiency: You pay only for what you use.
Scalability: Easily scale resources up or down based on demand.
Flexibility: Access resources from anywhere with an internet connection.
Reliability: Cloud providers offer high availability and redundancy.
Security: Cloud providers invest in robust security measures to secure data and the infrastructure.
Agility: Quickly deploy new applications and services without worrying about infrastructure.
Sustainability: Reduce energy consumption and carbon footprint by leveraging cloud resources

Cloud Service Models
Infrastructure as a Service(IaaS) is a form of cloud computing that provides virtualized computing, storage ,and networking resources over the internet. Examples include Amazon EC2, Amazon S3.
Platform as a Service(PaaS) is a cloud computing model where a third-party provider provides a platform for developing, testing and deploying software applications . Examples include Lamda and Elastic Beanstalk
Software as a Service(SaaS) is a software distribution model in which a cloud provider hosts applications and makes them available to end users over the internet. Examples include Salesforce, Zoom, Zendesk

Cloud Deployment models
Public cloud: The public cloud makes it possible for anybody to access systems and services in the cloud as it is open to everyone. The public cloud is one in which cloud infrastructure services are provided over the internet to the general people or major industry groups.
Private Cloud: The private cloud deployment model is the exact opposite of the public cloud deployment model. It’s a one-on-one environment for a single user or organization. The user manages the infrastructure and services.
Hybrid Cloud: It’s the combination of the public and private cloud deployment models with a layer of proprietary software, hybrid cloud computing gives the best of both worlds